Commit | Line | Data |
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e85d0918 DD |
1 | /* zd_mac.c |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2 of the License, or | |
6 | * (at your option) any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
17 | ||
18 | #include <linux/netdevice.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/wireless.h> | |
21 | #include <linux/usb.h> | |
22 | #include <linux/jiffies.h> | |
23 | #include <net/ieee80211_radiotap.h> | |
24 | ||
25 | #include "zd_def.h" | |
26 | #include "zd_chip.h" | |
27 | #include "zd_mac.h" | |
28 | #include "zd_ieee80211.h" | |
29 | #include "zd_netdev.h" | |
30 | #include "zd_rf.h" | |
31 | #include "zd_util.h" | |
32 | ||
33 | static void ieee_init(struct ieee80211_device *ieee); | |
34 | static void softmac_init(struct ieee80211softmac_device *sm); | |
6d5aefb8 DH |
35 | static void set_rts_cts_work(struct work_struct *work); |
36 | static void set_basic_rates_work(struct work_struct *work); | |
e85d0918 | 37 | |
583afd1e UK |
38 | static void housekeeping_init(struct zd_mac *mac); |
39 | static void housekeeping_enable(struct zd_mac *mac); | |
40 | static void housekeeping_disable(struct zd_mac *mac); | |
41 | ||
0ae85135 | 42 | static void set_multicast_hash_handler(struct work_struct *work); |
9cdac965 | 43 | |
4d1feabc UK |
44 | static void do_rx(unsigned long mac_ptr); |
45 | ||
e85d0918 DD |
46 | int zd_mac_init(struct zd_mac *mac, |
47 | struct net_device *netdev, | |
48 | struct usb_interface *intf) | |
49 | { | |
50 | struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev); | |
51 | ||
52 | memset(mac, 0, sizeof(*mac)); | |
53 | spin_lock_init(&mac->lock); | |
54 | mac->netdev = netdev; | |
6d5aefb8 DH |
55 | INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work); |
56 | INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work); | |
e85d0918 | 57 | |
4d1feabc UK |
58 | skb_queue_head_init(&mac->rx_queue); |
59 | tasklet_init(&mac->rx_tasklet, do_rx, (unsigned long)mac); | |
60 | tasklet_disable(&mac->rx_tasklet); | |
61 | ||
e85d0918 DD |
62 | ieee_init(ieee); |
63 | softmac_init(ieee80211_priv(netdev)); | |
64 | zd_chip_init(&mac->chip, netdev, intf); | |
583afd1e | 65 | housekeeping_init(mac); |
0ae85135 | 66 | INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler); |
e85d0918 DD |
67 | return 0; |
68 | } | |
69 | ||
70 | static int reset_channel(struct zd_mac *mac) | |
71 | { | |
72 | int r; | |
73 | unsigned long flags; | |
74 | const struct channel_range *range; | |
75 | ||
76 | spin_lock_irqsave(&mac->lock, flags); | |
77 | range = zd_channel_range(mac->regdomain); | |
78 | if (!range->start) { | |
79 | r = -EINVAL; | |
80 | goto out; | |
81 | } | |
82 | mac->requested_channel = range->start; | |
83 | r = 0; | |
84 | out: | |
85 | spin_unlock_irqrestore(&mac->lock, flags); | |
86 | return r; | |
87 | } | |
88 | ||
89 | int zd_mac_init_hw(struct zd_mac *mac, u8 device_type) | |
90 | { | |
91 | int r; | |
92 | struct zd_chip *chip = &mac->chip; | |
93 | u8 addr[ETH_ALEN]; | |
94 | u8 default_regdomain; | |
95 | ||
96 | r = zd_chip_enable_int(chip); | |
97 | if (r) | |
98 | goto out; | |
99 | r = zd_chip_init_hw(chip, device_type); | |
100 | if (r) | |
101 | goto disable_int; | |
102 | ||
103 | zd_get_e2p_mac_addr(chip, addr); | |
104 | r = zd_write_mac_addr(chip, addr); | |
105 | if (r) | |
106 | goto disable_int; | |
107 | ZD_ASSERT(!irqs_disabled()); | |
108 | spin_lock_irq(&mac->lock); | |
109 | memcpy(mac->netdev->dev_addr, addr, ETH_ALEN); | |
110 | spin_unlock_irq(&mac->lock); | |
111 | ||
112 | r = zd_read_regdomain(chip, &default_regdomain); | |
113 | if (r) | |
114 | goto disable_int; | |
115 | if (!zd_regdomain_supported(default_regdomain)) { | |
86d95c21 DD |
116 | /* The vendor driver overrides the regulatory domain and |
117 | * allowed channel registers and unconditionally restricts | |
118 | * available channels to 1-11 everywhere. Match their | |
119 | * questionable behaviour only for regdomains which we don't | |
120 | * recognise. */ | |
121 | dev_warn(zd_mac_dev(mac), "Unrecognised regulatory domain: " | |
122 | "%#04x. Defaulting to FCC.\n", default_regdomain); | |
123 | default_regdomain = ZD_REGDOMAIN_FCC; | |
e85d0918 DD |
124 | } |
125 | spin_lock_irq(&mac->lock); | |
126 | mac->regdomain = mac->default_regdomain = default_regdomain; | |
127 | spin_unlock_irq(&mac->lock); | |
128 | r = reset_channel(mac); | |
129 | if (r) | |
130 | goto disable_int; | |
131 | ||
40da08bc DD |
132 | /* We must inform the device that we are doing encryption/decryption in |
133 | * software at the moment. */ | |
134 | r = zd_set_encryption_type(chip, ENC_SNIFFER); | |
e85d0918 DD |
135 | if (r) |
136 | goto disable_int; | |
137 | ||
138 | r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain); | |
139 | if (r) | |
140 | goto disable_int; | |
141 | ||
142 | r = 0; | |
143 | disable_int: | |
144 | zd_chip_disable_int(chip); | |
145 | out: | |
146 | return r; | |
147 | } | |
148 | ||
149 | void zd_mac_clear(struct zd_mac *mac) | |
150 | { | |
9cdac965 | 151 | flush_workqueue(zd_workqueue); |
4d1feabc UK |
152 | skb_queue_purge(&mac->rx_queue); |
153 | tasklet_kill(&mac->rx_tasklet); | |
e85d0918 | 154 | zd_chip_clear(&mac->chip); |
c48cf125 UK |
155 | ZD_ASSERT(!spin_is_locked(&mac->lock)); |
156 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); | |
e85d0918 DD |
157 | } |
158 | ||
159 | static int reset_mode(struct zd_mac *mac) | |
160 | { | |
161 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); | |
44713b1d DD |
162 | u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER; |
163 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); | |
e85d0918 DD |
164 | } |
165 | ||
166 | int zd_mac_open(struct net_device *netdev) | |
167 | { | |
168 | struct zd_mac *mac = zd_netdev_mac(netdev); | |
169 | struct zd_chip *chip = &mac->chip; | |
170 | int r; | |
171 | ||
4d1feabc UK |
172 | tasklet_enable(&mac->rx_tasklet); |
173 | ||
e85d0918 DD |
174 | r = zd_chip_enable_int(chip); |
175 | if (r < 0) | |
176 | goto out; | |
177 | ||
178 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); | |
179 | if (r < 0) | |
180 | goto disable_int; | |
181 | r = reset_mode(mac); | |
182 | if (r) | |
183 | goto disable_int; | |
184 | r = zd_chip_switch_radio_on(chip); | |
185 | if (r < 0) | |
186 | goto disable_int; | |
187 | r = zd_chip_set_channel(chip, mac->requested_channel); | |
188 | if (r < 0) | |
189 | goto disable_radio; | |
190 | r = zd_chip_enable_rx(chip); | |
191 | if (r < 0) | |
192 | goto disable_radio; | |
193 | r = zd_chip_enable_hwint(chip); | |
194 | if (r < 0) | |
195 | goto disable_rx; | |
196 | ||
583afd1e | 197 | housekeeping_enable(mac); |
e85d0918 DD |
198 | ieee80211softmac_start(netdev); |
199 | return 0; | |
200 | disable_rx: | |
201 | zd_chip_disable_rx(chip); | |
202 | disable_radio: | |
203 | zd_chip_switch_radio_off(chip); | |
204 | disable_int: | |
205 | zd_chip_disable_int(chip); | |
206 | out: | |
207 | return r; | |
208 | } | |
209 | ||
210 | int zd_mac_stop(struct net_device *netdev) | |
211 | { | |
212 | struct zd_mac *mac = zd_netdev_mac(netdev); | |
213 | struct zd_chip *chip = &mac->chip; | |
214 | ||
c9a4b35d DD |
215 | netif_stop_queue(netdev); |
216 | ||
e85d0918 DD |
217 | /* |
218 | * The order here deliberately is a little different from the open() | |
219 | * method, since we need to make sure there is no opportunity for RX | |
220 | * frames to be processed by softmac after we have stopped it. | |
221 | */ | |
222 | ||
223 | zd_chip_disable_rx(chip); | |
4d1feabc UK |
224 | skb_queue_purge(&mac->rx_queue); |
225 | tasklet_disable(&mac->rx_tasklet); | |
583afd1e | 226 | housekeeping_disable(mac); |
e85d0918 DD |
227 | ieee80211softmac_stop(netdev); |
228 | ||
b1382ede DD |
229 | /* Ensure no work items are running or queued from this point */ |
230 | cancel_delayed_work(&mac->set_rts_cts_work); | |
231 | cancel_delayed_work(&mac->set_basic_rates_work); | |
232 | flush_workqueue(zd_workqueue); | |
233 | mac->updating_rts_rate = 0; | |
234 | mac->updating_basic_rates = 0; | |
235 | ||
e85d0918 DD |
236 | zd_chip_disable_hwint(chip); |
237 | zd_chip_switch_radio_off(chip); | |
238 | zd_chip_disable_int(chip); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | int zd_mac_set_mac_address(struct net_device *netdev, void *p) | |
244 | { | |
245 | int r; | |
246 | unsigned long flags; | |
247 | struct sockaddr *addr = p; | |
248 | struct zd_mac *mac = zd_netdev_mac(netdev); | |
249 | struct zd_chip *chip = &mac->chip; | |
250 | ||
251 | if (!is_valid_ether_addr(addr->sa_data)) | |
252 | return -EADDRNOTAVAIL; | |
253 | ||
254 | dev_dbg_f(zd_mac_dev(mac), | |
255 | "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data)); | |
256 | ||
257 | r = zd_write_mac_addr(chip, addr->sa_data); | |
258 | if (r) | |
259 | return r; | |
260 | ||
261 | spin_lock_irqsave(&mac->lock, flags); | |
262 | memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN); | |
263 | spin_unlock_irqrestore(&mac->lock, flags); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
0ae85135 | 268 | static void set_multicast_hash_handler(struct work_struct *work) |
9cdac965 | 269 | { |
0ae85135 JG |
270 | struct zd_mac *mac = container_of(work, struct zd_mac, |
271 | set_multicast_hash_work); | |
9cdac965 UK |
272 | struct zd_mc_hash hash; |
273 | ||
274 | spin_lock_irq(&mac->lock); | |
275 | hash = mac->multicast_hash; | |
276 | spin_unlock_irq(&mac->lock); | |
277 | ||
278 | zd_chip_set_multicast_hash(&mac->chip, &hash); | |
279 | } | |
280 | ||
281 | void zd_mac_set_multicast_list(struct net_device *dev) | |
282 | { | |
283 | struct zd_mc_hash hash; | |
284 | struct zd_mac *mac = zd_netdev_mac(dev); | |
285 | struct dev_mc_list *mc; | |
286 | unsigned long flags; | |
287 | ||
288 | if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) { | |
289 | zd_mc_add_all(&hash); | |
290 | } else { | |
291 | zd_mc_clear(&hash); | |
292 | for (mc = dev->mc_list; mc; mc = mc->next) { | |
293 | dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n", | |
294 | MAC_ARG(mc->dmi_addr)); | |
295 | zd_mc_add_addr(&hash, mc->dmi_addr); | |
296 | } | |
297 | } | |
298 | ||
299 | spin_lock_irqsave(&mac->lock, flags); | |
300 | mac->multicast_hash = hash; | |
301 | spin_unlock_irqrestore(&mac->lock, flags); | |
302 | queue_work(zd_workqueue, &mac->set_multicast_hash_work); | |
303 | } | |
304 | ||
e85d0918 DD |
305 | int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain) |
306 | { | |
307 | int r; | |
308 | u8 channel; | |
309 | ||
310 | ZD_ASSERT(!irqs_disabled()); | |
311 | spin_lock_irq(&mac->lock); | |
312 | if (regdomain == 0) { | |
313 | regdomain = mac->default_regdomain; | |
314 | } | |
315 | if (!zd_regdomain_supported(regdomain)) { | |
316 | spin_unlock_irq(&mac->lock); | |
317 | return -EINVAL; | |
318 | } | |
319 | mac->regdomain = regdomain; | |
320 | channel = mac->requested_channel; | |
321 | spin_unlock_irq(&mac->lock); | |
322 | ||
323 | r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain); | |
324 | if (r) | |
325 | return r; | |
326 | if (!zd_regdomain_supports_channel(regdomain, channel)) { | |
327 | r = reset_channel(mac); | |
328 | if (r) | |
329 | return r; | |
330 | } | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | u8 zd_mac_get_regdomain(struct zd_mac *mac) | |
336 | { | |
337 | unsigned long flags; | |
338 | u8 regdomain; | |
339 | ||
340 | spin_lock_irqsave(&mac->lock, flags); | |
341 | regdomain = mac->regdomain; | |
342 | spin_unlock_irqrestore(&mac->lock, flags); | |
343 | return regdomain; | |
344 | } | |
345 | ||
b1382ede DD |
346 | /* Fallback to lowest rate, if rate is unknown. */ |
347 | static u8 rate_to_zd_rate(u8 rate) | |
348 | { | |
349 | switch (rate) { | |
350 | case IEEE80211_CCK_RATE_2MB: | |
351 | return ZD_CCK_RATE_2M; | |
352 | case IEEE80211_CCK_RATE_5MB: | |
353 | return ZD_CCK_RATE_5_5M; | |
354 | case IEEE80211_CCK_RATE_11MB: | |
355 | return ZD_CCK_RATE_11M; | |
356 | case IEEE80211_OFDM_RATE_6MB: | |
357 | return ZD_OFDM_RATE_6M; | |
358 | case IEEE80211_OFDM_RATE_9MB: | |
359 | return ZD_OFDM_RATE_9M; | |
360 | case IEEE80211_OFDM_RATE_12MB: | |
361 | return ZD_OFDM_RATE_12M; | |
362 | case IEEE80211_OFDM_RATE_18MB: | |
363 | return ZD_OFDM_RATE_18M; | |
364 | case IEEE80211_OFDM_RATE_24MB: | |
365 | return ZD_OFDM_RATE_24M; | |
366 | case IEEE80211_OFDM_RATE_36MB: | |
367 | return ZD_OFDM_RATE_36M; | |
368 | case IEEE80211_OFDM_RATE_48MB: | |
369 | return ZD_OFDM_RATE_48M; | |
370 | case IEEE80211_OFDM_RATE_54MB: | |
371 | return ZD_OFDM_RATE_54M; | |
372 | } | |
373 | return ZD_CCK_RATE_1M; | |
374 | } | |
375 | ||
376 | static u16 rate_to_cr_rate(u8 rate) | |
377 | { | |
378 | switch (rate) { | |
379 | case IEEE80211_CCK_RATE_2MB: | |
380 | return CR_RATE_1M; | |
381 | case IEEE80211_CCK_RATE_5MB: | |
382 | return CR_RATE_5_5M; | |
383 | case IEEE80211_CCK_RATE_11MB: | |
384 | return CR_RATE_11M; | |
385 | case IEEE80211_OFDM_RATE_6MB: | |
386 | return CR_RATE_6M; | |
387 | case IEEE80211_OFDM_RATE_9MB: | |
388 | return CR_RATE_9M; | |
389 | case IEEE80211_OFDM_RATE_12MB: | |
390 | return CR_RATE_12M; | |
391 | case IEEE80211_OFDM_RATE_18MB: | |
392 | return CR_RATE_18M; | |
393 | case IEEE80211_OFDM_RATE_24MB: | |
394 | return CR_RATE_24M; | |
395 | case IEEE80211_OFDM_RATE_36MB: | |
396 | return CR_RATE_36M; | |
397 | case IEEE80211_OFDM_RATE_48MB: | |
398 | return CR_RATE_48M; | |
399 | case IEEE80211_OFDM_RATE_54MB: | |
400 | return CR_RATE_54M; | |
401 | } | |
402 | return CR_RATE_1M; | |
403 | } | |
404 | ||
405 | static void try_enable_tx(struct zd_mac *mac) | |
406 | { | |
407 | unsigned long flags; | |
408 | ||
409 | spin_lock_irqsave(&mac->lock, flags); | |
410 | if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0) | |
411 | netif_wake_queue(mac->netdev); | |
412 | spin_unlock_irqrestore(&mac->lock, flags); | |
413 | } | |
414 | ||
6d5aefb8 | 415 | static void set_rts_cts_work(struct work_struct *work) |
b1382ede | 416 | { |
6d5aefb8 DH |
417 | struct zd_mac *mac = |
418 | container_of(work, struct zd_mac, set_rts_cts_work.work); | |
b1382ede DD |
419 | unsigned long flags; |
420 | u8 rts_rate; | |
421 | unsigned int short_preamble; | |
422 | ||
423 | mutex_lock(&mac->chip.mutex); | |
424 | ||
425 | spin_lock_irqsave(&mac->lock, flags); | |
426 | mac->updating_rts_rate = 0; | |
427 | rts_rate = mac->rts_rate; | |
428 | short_preamble = mac->short_preamble; | |
429 | spin_unlock_irqrestore(&mac->lock, flags); | |
430 | ||
431 | zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble); | |
432 | mutex_unlock(&mac->chip.mutex); | |
433 | ||
434 | try_enable_tx(mac); | |
435 | } | |
436 | ||
6d5aefb8 | 437 | static void set_basic_rates_work(struct work_struct *work) |
b1382ede | 438 | { |
6d5aefb8 DH |
439 | struct zd_mac *mac = |
440 | container_of(work, struct zd_mac, set_basic_rates_work.work); | |
b1382ede DD |
441 | unsigned long flags; |
442 | u16 basic_rates; | |
443 | ||
444 | mutex_lock(&mac->chip.mutex); | |
445 | ||
446 | spin_lock_irqsave(&mac->lock, flags); | |
447 | mac->updating_basic_rates = 0; | |
448 | basic_rates = mac->basic_rates; | |
449 | spin_unlock_irqrestore(&mac->lock, flags); | |
450 | ||
451 | zd_chip_set_basic_rates_locked(&mac->chip, basic_rates); | |
452 | mutex_unlock(&mac->chip.mutex); | |
453 | ||
454 | try_enable_tx(mac); | |
455 | } | |
456 | ||
457 | static void bssinfo_change(struct net_device *netdev, u32 changes) | |
458 | { | |
459 | struct zd_mac *mac = zd_netdev_mac(netdev); | |
460 | struct ieee80211softmac_device *softmac = ieee80211_priv(netdev); | |
461 | struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo; | |
462 | int need_set_rts_cts = 0; | |
463 | int need_set_rates = 0; | |
464 | u16 basic_rates; | |
465 | unsigned long flags; | |
466 | ||
467 | dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); | |
468 | ||
469 | if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) { | |
470 | spin_lock_irqsave(&mac->lock, flags); | |
471 | mac->short_preamble = bssinfo->short_preamble; | |
472 | spin_unlock_irqrestore(&mac->lock, flags); | |
473 | need_set_rts_cts = 1; | |
474 | } | |
475 | ||
476 | if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) { | |
477 | /* Set RTS rate to highest available basic rate */ | |
4d1feabc | 478 | u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac, |
b1382ede | 479 | &bssinfo->supported_rates, 1); |
4d1feabc | 480 | hi_rate = rate_to_zd_rate(hi_rate); |
b1382ede DD |
481 | |
482 | spin_lock_irqsave(&mac->lock, flags); | |
4d1feabc UK |
483 | if (hi_rate != mac->rts_rate) { |
484 | mac->rts_rate = hi_rate; | |
b1382ede DD |
485 | need_set_rts_cts = 1; |
486 | } | |
487 | spin_unlock_irqrestore(&mac->lock, flags); | |
488 | ||
489 | /* Set basic rates */ | |
490 | need_set_rates = 1; | |
491 | if (bssinfo->supported_rates.count == 0) { | |
492 | /* Allow the device to be flexible */ | |
493 | basic_rates = CR_RATES_80211B | CR_RATES_80211G; | |
494 | } else { | |
495 | int i = 0; | |
496 | basic_rates = 0; | |
497 | ||
498 | for (i = 0; i < bssinfo->supported_rates.count; i++) { | |
499 | u16 rate = bssinfo->supported_rates.rates[i]; | |
500 | if ((rate & IEEE80211_BASIC_RATE_MASK) == 0) | |
501 | continue; | |
502 | ||
503 | rate &= ~IEEE80211_BASIC_RATE_MASK; | |
504 | basic_rates |= rate_to_cr_rate(rate); | |
505 | } | |
506 | } | |
507 | spin_lock_irqsave(&mac->lock, flags); | |
508 | mac->basic_rates = basic_rates; | |
509 | spin_unlock_irqrestore(&mac->lock, flags); | |
510 | } | |
511 | ||
512 | /* Schedule any changes we made above */ | |
513 | ||
514 | spin_lock_irqsave(&mac->lock, flags); | |
515 | if (need_set_rts_cts && !mac->updating_rts_rate) { | |
516 | mac->updating_rts_rate = 1; | |
517 | netif_stop_queue(mac->netdev); | |
6d5aefb8 | 518 | queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0); |
b1382ede DD |
519 | } |
520 | if (need_set_rates && !mac->updating_basic_rates) { | |
521 | mac->updating_basic_rates = 1; | |
522 | netif_stop_queue(mac->netdev); | |
6d5aefb8 DH |
523 | queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work, |
524 | 0); | |
b1382ede DD |
525 | } |
526 | spin_unlock_irqrestore(&mac->lock, flags); | |
527 | } | |
528 | ||
e85d0918 DD |
529 | static void set_channel(struct net_device *netdev, u8 channel) |
530 | { | |
531 | struct zd_mac *mac = zd_netdev_mac(netdev); | |
532 | ||
533 | dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel); | |
534 | ||
535 | zd_chip_set_channel(&mac->chip, channel); | |
536 | } | |
537 | ||
e85d0918 DD |
538 | int zd_mac_request_channel(struct zd_mac *mac, u8 channel) |
539 | { | |
540 | unsigned long lock_flags; | |
541 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); | |
542 | ||
543 | if (ieee->iw_mode == IW_MODE_INFRA) | |
544 | return -EPERM; | |
545 | ||
546 | spin_lock_irqsave(&mac->lock, lock_flags); | |
547 | if (!zd_regdomain_supports_channel(mac->regdomain, channel)) { | |
548 | spin_unlock_irqrestore(&mac->lock, lock_flags); | |
549 | return -EINVAL; | |
550 | } | |
551 | mac->requested_channel = channel; | |
552 | spin_unlock_irqrestore(&mac->lock, lock_flags); | |
553 | if (netif_running(mac->netdev)) | |
554 | return zd_chip_set_channel(&mac->chip, channel); | |
555 | else | |
556 | return 0; | |
557 | } | |
558 | ||
84bc715c | 559 | u8 zd_mac_get_channel(struct zd_mac *mac) |
e85d0918 | 560 | { |
84bc715c | 561 | u8 channel = zd_chip_get_channel(&mac->chip); |
e85d0918 | 562 | |
84bc715c DD |
563 | dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel); |
564 | return channel; | |
e85d0918 DD |
565 | } |
566 | ||
567 | /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */ | |
b1cd8416 | 568 | static u8 zd_rate_typed(u8 zd_rate) |
e85d0918 DD |
569 | { |
570 | static const u8 typed_rates[16] = { | |
b1cd8416 DD |
571 | [ZD_CCK_RATE_1M] = ZD_CS_CCK|ZD_CCK_RATE_1M, |
572 | [ZD_CCK_RATE_2M] = ZD_CS_CCK|ZD_CCK_RATE_2M, | |
573 | [ZD_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CCK_RATE_5_5M, | |
574 | [ZD_CCK_RATE_11M] = ZD_CS_CCK|ZD_CCK_RATE_11M, | |
e85d0918 DD |
575 | [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M, |
576 | [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M, | |
577 | [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M, | |
578 | [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M, | |
579 | [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M, | |
580 | [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M, | |
581 | [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M, | |
582 | [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M, | |
583 | }; | |
584 | ||
585 | ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f); | |
b1cd8416 | 586 | return typed_rates[zd_rate & ZD_CS_RATE_MASK]; |
e85d0918 DD |
587 | } |
588 | ||
589 | int zd_mac_set_mode(struct zd_mac *mac, u32 mode) | |
590 | { | |
591 | struct ieee80211_device *ieee; | |
592 | ||
593 | switch (mode) { | |
594 | case IW_MODE_AUTO: | |
595 | case IW_MODE_ADHOC: | |
596 | case IW_MODE_INFRA: | |
597 | mac->netdev->type = ARPHRD_ETHER; | |
598 | break; | |
599 | case IW_MODE_MONITOR: | |
600 | mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP; | |
601 | break; | |
602 | default: | |
603 | dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode); | |
604 | return -EINVAL; | |
605 | } | |
606 | ||
607 | ieee = zd_mac_to_ieee80211(mac); | |
608 | ZD_ASSERT(!irqs_disabled()); | |
609 | spin_lock_irq(&ieee->lock); | |
610 | ieee->iw_mode = mode; | |
611 | spin_unlock_irq(&ieee->lock); | |
612 | ||
613 | if (netif_running(mac->netdev)) | |
614 | return reset_mode(mac); | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | int zd_mac_get_mode(struct zd_mac *mac, u32 *mode) | |
620 | { | |
621 | unsigned long flags; | |
622 | struct ieee80211_device *ieee; | |
623 | ||
624 | ieee = zd_mac_to_ieee80211(mac); | |
625 | spin_lock_irqsave(&ieee->lock, flags); | |
626 | *mode = ieee->iw_mode; | |
627 | spin_unlock_irqrestore(&ieee->lock, flags); | |
628 | return 0; | |
629 | } | |
630 | ||
631 | int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range) | |
632 | { | |
633 | int i; | |
634 | const struct channel_range *channel_range; | |
635 | u8 regdomain; | |
636 | ||
637 | memset(range, 0, sizeof(*range)); | |
638 | ||
639 | /* FIXME: Not so important and depends on the mode. For 802.11g | |
640 | * usually this value is used. It seems to be that Bit/s number is | |
641 | * given here. | |
642 | */ | |
643 | range->throughput = 27 * 1000 * 1000; | |
644 | ||
645 | range->max_qual.qual = 100; | |
646 | range->max_qual.level = 100; | |
647 | ||
648 | /* FIXME: Needs still to be tuned. */ | |
649 | range->avg_qual.qual = 71; | |
650 | range->avg_qual.level = 80; | |
651 | ||
652 | /* FIXME: depends on standard? */ | |
653 | range->min_rts = 256; | |
654 | range->max_rts = 2346; | |
655 | ||
656 | range->min_frag = MIN_FRAG_THRESHOLD; | |
657 | range->max_frag = MAX_FRAG_THRESHOLD; | |
658 | ||
659 | range->max_encoding_tokens = WEP_KEYS; | |
660 | range->num_encoding_sizes = 2; | |
661 | range->encoding_size[0] = 5; | |
662 | range->encoding_size[1] = WEP_KEY_LEN; | |
663 | ||
664 | range->we_version_compiled = WIRELESS_EXT; | |
665 | range->we_version_source = 20; | |
666 | ||
ff9b99bc DD |
667 | range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 | |
668 | IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP; | |
669 | ||
e85d0918 DD |
670 | ZD_ASSERT(!irqs_disabled()); |
671 | spin_lock_irq(&mac->lock); | |
672 | regdomain = mac->regdomain; | |
673 | spin_unlock_irq(&mac->lock); | |
674 | channel_range = zd_channel_range(regdomain); | |
675 | ||
676 | range->num_channels = channel_range->end - channel_range->start; | |
677 | range->old_num_channels = range->num_channels; | |
678 | range->num_frequency = range->num_channels; | |
679 | range->old_num_frequency = range->num_frequency; | |
680 | ||
681 | for (i = 0; i < range->num_frequency; i++) { | |
682 | struct iw_freq *freq = &range->freq[i]; | |
683 | freq->i = channel_range->start + i; | |
684 | zd_channel_to_freq(freq, freq->i); | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
b1cd8416 | 690 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
e85d0918 DD |
691 | { |
692 | static const u8 rate_divisor[] = { | |
b1cd8416 DD |
693 | [ZD_CCK_RATE_1M] = 1, |
694 | [ZD_CCK_RATE_2M] = 2, | |
695 | [ZD_CCK_RATE_5_5M] = 11, /* bits must be doubled */ | |
696 | [ZD_CCK_RATE_11M] = 11, | |
e85d0918 DD |
697 | [ZD_OFDM_RATE_6M] = 6, |
698 | [ZD_OFDM_RATE_9M] = 9, | |
699 | [ZD_OFDM_RATE_12M] = 12, | |
700 | [ZD_OFDM_RATE_18M] = 18, | |
701 | [ZD_OFDM_RATE_24M] = 24, | |
702 | [ZD_OFDM_RATE_36M] = 36, | |
703 | [ZD_OFDM_RATE_48M] = 48, | |
704 | [ZD_OFDM_RATE_54M] = 54, | |
705 | }; | |
706 | ||
707 | u32 bits = (u32)tx_length * 8; | |
708 | u32 divisor; | |
709 | ||
b1cd8416 | 710 | divisor = rate_divisor[zd_rate]; |
e85d0918 DD |
711 | if (divisor == 0) |
712 | return -EINVAL; | |
713 | ||
b1cd8416 DD |
714 | switch (zd_rate) { |
715 | case ZD_CCK_RATE_5_5M: | |
e85d0918 DD |
716 | bits = (2*bits) + 10; /* round up to the next integer */ |
717 | break; | |
b1cd8416 | 718 | case ZD_CCK_RATE_11M: |
e85d0918 DD |
719 | if (service) { |
720 | u32 t = bits % 11; | |
721 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
722 | if (0 < t && t <= 3) { | |
723 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
724 | } | |
725 | } | |
726 | bits += 10; /* round up to the next integer */ | |
727 | break; | |
728 | } | |
729 | ||
730 | return bits/divisor; | |
731 | } | |
732 | ||
733 | enum { | |
734 | R2M_SHORT_PREAMBLE = 0x01, | |
735 | R2M_11A = 0x02, | |
736 | }; | |
737 | ||
b1cd8416 | 738 | static u8 zd_rate_to_modulation(u8 zd_rate, int flags) |
e85d0918 DD |
739 | { |
740 | u8 modulation; | |
741 | ||
b1cd8416 | 742 | modulation = zd_rate_typed(zd_rate); |
e85d0918 DD |
743 | if (flags & R2M_SHORT_PREAMBLE) { |
744 | switch (ZD_CS_RATE(modulation)) { | |
b1cd8416 DD |
745 | case ZD_CCK_RATE_2M: |
746 | case ZD_CCK_RATE_5_5M: | |
747 | case ZD_CCK_RATE_11M: | |
e85d0918 DD |
748 | modulation |= ZD_CS_CCK_PREA_SHORT; |
749 | return modulation; | |
750 | } | |
751 | } | |
752 | if (flags & R2M_11A) { | |
753 | if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM) | |
754 | modulation |= ZD_CS_OFDM_MODE_11A; | |
755 | } | |
756 | return modulation; | |
757 | } | |
758 | ||
759 | static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs, | |
760 | struct ieee80211_hdr_4addr *hdr) | |
761 | { | |
762 | struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev); | |
763 | u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl)); | |
b1cd8416 | 764 | u8 rate, zd_rate; |
e85d0918 | 765 | int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0; |
b1382ede DD |
766 | int is_multicast = is_multicast_ether_addr(hdr->addr1); |
767 | int short_preamble = ieee80211softmac_short_preamble_ok(softmac, | |
768 | is_multicast, is_mgt); | |
769 | int flags = 0; | |
e85d0918 | 770 | |
b1382ede DD |
771 | /* FIXME: 802.11a? */ |
772 | rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt); | |
e85d0918 | 773 | |
b1382ede DD |
774 | if (short_preamble) |
775 | flags |= R2M_SHORT_PREAMBLE; | |
e85d0918 | 776 | |
b1cd8416 | 777 | zd_rate = rate_to_zd_rate(rate); |
b1382ede | 778 | cs->modulation = zd_rate_to_modulation(zd_rate, flags); |
e85d0918 DD |
779 | } |
780 | ||
781 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, | |
782 | struct ieee80211_hdr_4addr *header) | |
783 | { | |
b1382ede | 784 | struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev); |
e85d0918 DD |
785 | unsigned int tx_length = le16_to_cpu(cs->tx_length); |
786 | u16 fctl = le16_to_cpu(header->frame_ctl); | |
787 | u16 ftype = WLAN_FC_GET_TYPE(fctl); | |
788 | u16 stype = WLAN_FC_GET_STYPE(fctl); | |
789 | ||
790 | /* | |
b1382ede | 791 | * CONTROL TODO: |
e85d0918 DD |
792 | * - if backoff needed, enable bit 0 |
793 | * - if burst (backoff not needed) disable bit 0 | |
e85d0918 DD |
794 | */ |
795 | ||
796 | cs->control = 0; | |
797 | ||
798 | /* First fragment */ | |
799 | if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0) | |
800 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; | |
801 | ||
802 | /* Multicast */ | |
803 | if (is_multicast_ether_addr(header->addr1)) | |
804 | cs->control |= ZD_CS_MULTICAST; | |
805 | ||
806 | /* PS-POLL */ | |
807 | if (stype == IEEE80211_STYPE_PSPOLL) | |
808 | cs->control |= ZD_CS_PS_POLL_FRAME; | |
809 | ||
b1382ede | 810 | /* Unicast data frames over the threshold should have RTS */ |
e85d0918 | 811 | if (!is_multicast_ether_addr(header->addr1) && |
b1382ede DD |
812 | ftype != IEEE80211_FTYPE_MGMT && |
813 | tx_length > zd_netdev_ieee80211(mac->netdev)->rts) | |
814 | cs->control |= ZD_CS_RTS; | |
815 | ||
816 | /* Use CTS-to-self protection if required */ | |
817 | if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM && | |
818 | ieee80211softmac_protection_needed(softmac)) { | |
819 | /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */ | |
820 | cs->control &= ~ZD_CS_RTS; | |
821 | cs->control |= ZD_CS_SELF_CTS; | |
e85d0918 DD |
822 | } |
823 | ||
824 | /* FIXME: Management frame? */ | |
825 | } | |
826 | ||
827 | static int fill_ctrlset(struct zd_mac *mac, | |
828 | struct ieee80211_txb *txb, | |
829 | int frag_num) | |
830 | { | |
831 | int r; | |
832 | struct sk_buff *skb = txb->fragments[frag_num]; | |
833 | struct ieee80211_hdr_4addr *hdr = | |
834 | (struct ieee80211_hdr_4addr *) skb->data; | |
835 | unsigned int frag_len = skb->len + IEEE80211_FCS_LEN; | |
836 | unsigned int next_frag_len; | |
837 | unsigned int packet_length; | |
838 | struct zd_ctrlset *cs = (struct zd_ctrlset *) | |
839 | skb_push(skb, sizeof(struct zd_ctrlset)); | |
840 | ||
841 | if (frag_num+1 < txb->nr_frags) { | |
842 | next_frag_len = txb->fragments[frag_num+1]->len + | |
843 | IEEE80211_FCS_LEN; | |
844 | } else { | |
845 | next_frag_len = 0; | |
846 | } | |
847 | ZD_ASSERT(frag_len <= 0xffff); | |
848 | ZD_ASSERT(next_frag_len <= 0xffff); | |
849 | ||
850 | cs_set_modulation(mac, cs, hdr); | |
851 | ||
852 | cs->tx_length = cpu_to_le16(frag_len); | |
853 | ||
854 | cs_set_control(mac, cs, hdr); | |
855 | ||
856 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; | |
857 | ZD_ASSERT(packet_length <= 0xffff); | |
858 | /* ZD1211B: Computing the length difference this way, gives us | |
859 | * flexibility to compute the packet length. | |
860 | */ | |
861 | cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ? | |
862 | packet_length - frag_len : packet_length); | |
863 | ||
864 | /* | |
865 | * CURRENT LENGTH: | |
866 | * - transmit frame length in microseconds | |
867 | * - seems to be derived from frame length | |
868 | * - see Cal_Us_Service() in zdinlinef.h | |
869 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 | |
870 | * - bTxBurstEnable is never set in the vendor driver | |
871 | * | |
872 | * SERVICE: | |
873 | * - "for PLCP configuration" | |
874 | * - always 0 except in some situations at 802.11b 11M | |
875 | * - see line 53 of zdinlinef.h | |
876 | */ | |
877 | cs->service = 0; | |
878 | r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation), | |
879 | le16_to_cpu(cs->tx_length)); | |
880 | if (r < 0) | |
881 | return r; | |
882 | cs->current_length = cpu_to_le16(r); | |
883 | ||
884 | if (next_frag_len == 0) { | |
885 | cs->next_frame_length = 0; | |
886 | } else { | |
887 | r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation), | |
888 | next_frag_len); | |
889 | if (r < 0) | |
890 | return r; | |
891 | cs->next_frame_length = cpu_to_le16(r); | |
892 | } | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri) | |
898 | { | |
899 | int i, r; | |
22d3405f | 900 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
e85d0918 DD |
901 | |
902 | for (i = 0; i < txb->nr_frags; i++) { | |
903 | struct sk_buff *skb = txb->fragments[i]; | |
904 | ||
905 | r = fill_ctrlset(mac, txb, i); | |
22d3405f UK |
906 | if (r) { |
907 | ieee->stats.tx_dropped++; | |
e85d0918 | 908 | return r; |
22d3405f | 909 | } |
e85d0918 | 910 | r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len); |
22d3405f UK |
911 | if (r) { |
912 | ieee->stats.tx_dropped++; | |
e85d0918 | 913 | return r; |
22d3405f | 914 | } |
e85d0918 DD |
915 | } |
916 | ||
917 | /* FIXME: shouldn't this be handled by the upper layers? */ | |
918 | mac->netdev->trans_start = jiffies; | |
919 | ||
920 | ieee80211_txb_free(txb); | |
921 | return 0; | |
922 | } | |
923 | ||
924 | struct zd_rt_hdr { | |
925 | struct ieee80211_radiotap_header rt_hdr; | |
926 | u8 rt_flags; | |
99f65f25 | 927 | u8 rt_rate; |
e85d0918 DD |
928 | u16 rt_channel; |
929 | u16 rt_chbitmask; | |
a88556a4 | 930 | } __attribute__((packed)); |
e85d0918 DD |
931 | |
932 | static void fill_rt_header(void *buffer, struct zd_mac *mac, | |
933 | const struct ieee80211_rx_stats *stats, | |
934 | const struct rx_status *status) | |
935 | { | |
936 | struct zd_rt_hdr *hdr = buffer; | |
937 | ||
938 | hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION; | |
939 | hdr->rt_hdr.it_pad = 0; | |
940 | hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr)); | |
941 | hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
942 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
943 | (1 << IEEE80211_RADIOTAP_RATE)); | |
944 | ||
945 | hdr->rt_flags = 0; | |
946 | if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256)) | |
947 | hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP; | |
948 | ||
99f65f25 UK |
949 | hdr->rt_rate = stats->rate / 5; |
950 | ||
e85d0918 DD |
951 | /* FIXME: 802.11a */ |
952 | hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz( | |
953 | _zd_chip_get_channel(&mac->chip))); | |
954 | hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ | | |
955 | ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) == | |
956 | ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK)); | |
e85d0918 DD |
957 | } |
958 | ||
959 | /* Returns 1 if the data packet is for us and 0 otherwise. */ | |
960 | static int is_data_packet_for_us(struct ieee80211_device *ieee, | |
961 | struct ieee80211_hdr_4addr *hdr) | |
962 | { | |
963 | struct net_device *netdev = ieee->dev; | |
964 | u16 fc = le16_to_cpu(hdr->frame_ctl); | |
965 | ||
966 | ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA); | |
967 | ||
968 | switch (ieee->iw_mode) { | |
969 | case IW_MODE_ADHOC: | |
970 | if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 || | |
832855dc | 971 | compare_ether_addr(hdr->addr3, ieee->bssid) != 0) |
e85d0918 DD |
972 | return 0; |
973 | break; | |
974 | case IW_MODE_AUTO: | |
975 | case IW_MODE_INFRA: | |
976 | if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != | |
977 | IEEE80211_FCTL_FROMDS || | |
832855dc | 978 | compare_ether_addr(hdr->addr2, ieee->bssid) != 0) |
e85d0918 DD |
979 | return 0; |
980 | break; | |
981 | default: | |
982 | ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR); | |
983 | return 0; | |
984 | } | |
985 | ||
832855dc | 986 | return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 || |
9cdac965 | 987 | (is_multicast_ether_addr(hdr->addr1) && |
832855dc | 988 | compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) || |
e85d0918 DD |
989 | (netdev->flags & IFF_PROMISC); |
990 | } | |
991 | ||
741fec53 UK |
992 | /* Filters received packets. The function returns 1 if the packet should be |
993 | * forwarded to ieee80211_rx(). If the packet should be ignored the function | |
994 | * returns 0. If an invalid packet is found the function returns -EINVAL. | |
995 | * | |
996 | * The function calls ieee80211_rx_mgt() directly. | |
e85d0918 DD |
997 | * |
998 | * It has been based on ieee80211_rx_any. | |
999 | */ | |
1000 | static int filter_rx(struct ieee80211_device *ieee, | |
1001 | const u8 *buffer, unsigned int length, | |
1002 | struct ieee80211_rx_stats *stats) | |
1003 | { | |
1004 | struct ieee80211_hdr_4addr *hdr; | |
1005 | u16 fc; | |
1006 | ||
1007 | if (ieee->iw_mode == IW_MODE_MONITOR) | |
1008 | return 1; | |
1009 | ||
1010 | hdr = (struct ieee80211_hdr_4addr *)buffer; | |
1011 | fc = le16_to_cpu(hdr->frame_ctl); | |
1012 | if ((fc & IEEE80211_FCTL_VERS) != 0) | |
1013 | return -EINVAL; | |
1014 | ||
1015 | switch (WLAN_FC_GET_TYPE(fc)) { | |
1016 | case IEEE80211_FTYPE_MGMT: | |
1017 | if (length < sizeof(struct ieee80211_hdr_3addr)) | |
1018 | return -EINVAL; | |
1019 | ieee80211_rx_mgt(ieee, hdr, stats); | |
1020 | return 0; | |
1021 | case IEEE80211_FTYPE_CTL: | |
e85d0918 DD |
1022 | return 0; |
1023 | case IEEE80211_FTYPE_DATA: | |
741fec53 | 1024 | /* Ignore invalid short buffers */ |
e85d0918 DD |
1025 | if (length < sizeof(struct ieee80211_hdr_3addr)) |
1026 | return -EINVAL; | |
1027 | return is_data_packet_for_us(ieee, hdr); | |
1028 | } | |
1029 | ||
1030 | return -EINVAL; | |
1031 | } | |
1032 | ||
db888aed UK |
1033 | static void update_qual_rssi(struct zd_mac *mac, |
1034 | const u8 *buffer, unsigned int length, | |
1035 | u8 qual_percent, u8 rssi_percent) | |
e85d0918 DD |
1036 | { |
1037 | unsigned long flags; | |
db888aed UK |
1038 | struct ieee80211_hdr_3addr *hdr; |
1039 | int i; | |
1040 | ||
1041 | hdr = (struct ieee80211_hdr_3addr *)buffer; | |
1042 | if (length < offsetof(struct ieee80211_hdr_3addr, addr3)) | |
1043 | return; | |
832855dc | 1044 | if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0) |
db888aed | 1045 | return; |
e85d0918 DD |
1046 | |
1047 | spin_lock_irqsave(&mac->lock, flags); | |
db888aed UK |
1048 | i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE; |
1049 | mac->qual_buffer[i] = qual_percent; | |
1050 | mac->rssi_buffer[i] = rssi_percent; | |
1051 | mac->stats_count++; | |
e85d0918 DD |
1052 | spin_unlock_irqrestore(&mac->lock, flags); |
1053 | } | |
1054 | ||
1055 | static int fill_rx_stats(struct ieee80211_rx_stats *stats, | |
1056 | const struct rx_status **pstatus, | |
1057 | struct zd_mac *mac, | |
1058 | const u8 *buffer, unsigned int length) | |
1059 | { | |
1060 | const struct rx_status *status; | |
1061 | ||
1062 | *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status)); | |
1063 | if (status->frame_status & ZD_RX_ERROR) { | |
22d3405f UK |
1064 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
1065 | ieee->stats.rx_errors++; | |
1066 | if (status->frame_status & ZD_RX_TIMEOUT_ERROR) | |
1067 | ieee->stats.rx_missed_errors++; | |
1068 | else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR) | |
1069 | ieee->stats.rx_fifo_errors++; | |
1070 | else if (status->frame_status & ZD_RX_DECRYPTION_ERROR) | |
1071 | ieee->ieee_stats.rx_discards_undecryptable++; | |
1072 | else if (status->frame_status & ZD_RX_CRC32_ERROR) { | |
1073 | ieee->stats.rx_crc_errors++; | |
1074 | ieee->ieee_stats.rx_fcs_errors++; | |
1075 | } | |
1076 | else if (status->frame_status & ZD_RX_CRC16_ERROR) | |
1077 | ieee->stats.rx_crc_errors++; | |
e85d0918 DD |
1078 | return -EINVAL; |
1079 | } | |
22d3405f | 1080 | |
e85d0918 DD |
1081 | memset(stats, 0, sizeof(struct ieee80211_rx_stats)); |
1082 | stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN + | |
1083 | + sizeof(struct rx_status)); | |
1084 | /* FIXME: 802.11a */ | |
1085 | stats->freq = IEEE80211_24GHZ_BAND; | |
1086 | stats->received_channel = _zd_chip_get_channel(&mac->chip); | |
1087 | stats->rssi = zd_rx_strength_percent(status->signal_strength); | |
1088 | stats->signal = zd_rx_qual_percent(buffer, | |
1089 | length - sizeof(struct rx_status), | |
1090 | status); | |
1091 | stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL; | |
1092 | stats->rate = zd_rx_rate(buffer, status); | |
1093 | if (stats->rate) | |
1094 | stats->mask |= IEEE80211_STATMASK_RATE; | |
1095 | ||
e85d0918 DD |
1096 | return 0; |
1097 | } | |
1098 | ||
4d1feabc | 1099 | static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb) |
e85d0918 DD |
1100 | { |
1101 | int r; | |
1102 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); | |
1103 | struct ieee80211_rx_stats stats; | |
1104 | const struct rx_status *status; | |
e85d0918 | 1105 | |
4d1feabc UK |
1106 | if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN + |
1107 | IEEE80211_FCS_LEN + sizeof(struct rx_status)) | |
1108 | { | |
22d3405f UK |
1109 | ieee->stats.rx_errors++; |
1110 | ieee->stats.rx_length_errors++; | |
4d1feabc UK |
1111 | goto free_skb; |
1112 | } | |
e85d0918 | 1113 | |
4d1feabc UK |
1114 | r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len); |
1115 | if (r) { | |
22d3405f UK |
1116 | /* Only packets with rx errors are included here. |
1117 | * The error stats have already been set in fill_rx_stats. | |
1118 | */ | |
4d1feabc UK |
1119 | goto free_skb; |
1120 | } | |
e85d0918 | 1121 | |
4d1feabc UK |
1122 | __skb_pull(skb, ZD_PLCP_HEADER_SIZE); |
1123 | __skb_trim(skb, skb->len - | |
1124 | (IEEE80211_FCS_LEN + sizeof(struct rx_status))); | |
e85d0918 | 1125 | |
4d1feabc UK |
1126 | update_qual_rssi(mac, skb->data, skb->len, stats.signal, |
1127 | status->signal_strength); | |
db888aed | 1128 | |
4d1feabc UK |
1129 | r = filter_rx(ieee, skb->data, skb->len, &stats); |
1130 | if (r <= 0) { | |
22d3405f UK |
1131 | if (r < 0) { |
1132 | ieee->stats.rx_errors++; | |
4d1feabc | 1133 | dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n"); |
22d3405f | 1134 | } |
4d1feabc UK |
1135 | goto free_skb; |
1136 | } | |
e85d0918 | 1137 | |
e85d0918 | 1138 | if (ieee->iw_mode == IW_MODE_MONITOR) |
4d1feabc | 1139 | fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac, |
e85d0918 | 1140 | &stats, status); |
e85d0918 DD |
1141 | |
1142 | r = ieee80211_rx(ieee, skb, &stats); | |
4d1feabc UK |
1143 | if (r) |
1144 | return; | |
1145 | free_skb: | |
1146 | /* We are always in a soft irq. */ | |
1147 | dev_kfree_skb(skb); | |
1148 | } | |
1149 | ||
1150 | static void do_rx(unsigned long mac_ptr) | |
1151 | { | |
1152 | struct zd_mac *mac = (struct zd_mac *)mac_ptr; | |
1153 | struct sk_buff *skb; | |
1154 | ||
1155 | while ((skb = skb_dequeue(&mac->rx_queue)) != NULL) | |
1156 | zd_mac_rx(mac, skb); | |
1157 | } | |
1158 | ||
1159 | int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length) | |
1160 | { | |
1161 | struct sk_buff *skb; | |
1162 | ||
1163 | skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length); | |
1164 | if (!skb) { | |
22d3405f | 1165 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
4d1feabc | 1166 | dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n"); |
22d3405f | 1167 | ieee->stats.rx_dropped++; |
4d1feabc UK |
1168 | return -ENOMEM; |
1169 | } | |
1170 | skb_reserve(skb, sizeof(struct zd_rt_hdr)); | |
1171 | memcpy(__skb_put(skb, length), buffer, length); | |
1172 | skb_queue_tail(&mac->rx_queue, skb); | |
1173 | tasklet_schedule(&mac->rx_tasklet); | |
e85d0918 DD |
1174 | return 0; |
1175 | } | |
1176 | ||
1177 | static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev, | |
1178 | int pri) | |
1179 | { | |
1180 | return zd_mac_tx(zd_netdev_mac(netdev), txb, pri); | |
1181 | } | |
1182 | ||
1183 | static void set_security(struct net_device *netdev, | |
1184 | struct ieee80211_security *sec) | |
1185 | { | |
1186 | struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev); | |
1187 | struct ieee80211_security *secinfo = &ieee->sec; | |
1188 | int keyidx; | |
1189 | ||
1190 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n"); | |
1191 | ||
1192 | for (keyidx = 0; keyidx<WEP_KEYS; keyidx++) | |
1193 | if (sec->flags & (1<<keyidx)) { | |
1194 | secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx]; | |
1195 | secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx]; | |
1196 | memcpy(secinfo->keys[keyidx], sec->keys[keyidx], | |
1197 | SCM_KEY_LEN); | |
1198 | } | |
1199 | ||
1200 | if (sec->flags & SEC_ACTIVE_KEY) { | |
1201 | secinfo->active_key = sec->active_key; | |
1202 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), | |
1203 | " .active_key = %d\n", sec->active_key); | |
1204 | } | |
1205 | if (sec->flags & SEC_UNICAST_GROUP) { | |
1206 | secinfo->unicast_uses_group = sec->unicast_uses_group; | |
1207 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), | |
1208 | " .unicast_uses_group = %d\n", | |
1209 | sec->unicast_uses_group); | |
1210 | } | |
1211 | if (sec->flags & SEC_LEVEL) { | |
1212 | secinfo->level = sec->level; | |
1213 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), | |
1214 | " .level = %d\n", sec->level); | |
1215 | } | |
1216 | if (sec->flags & SEC_ENABLED) { | |
1217 | secinfo->enabled = sec->enabled; | |
1218 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), | |
1219 | " .enabled = %d\n", sec->enabled); | |
1220 | } | |
1221 | if (sec->flags & SEC_ENCRYPT) { | |
1222 | secinfo->encrypt = sec->encrypt; | |
1223 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), | |
1224 | " .encrypt = %d\n", sec->encrypt); | |
1225 | } | |
1226 | if (sec->flags & SEC_AUTH_MODE) { | |
1227 | secinfo->auth_mode = sec->auth_mode; | |
1228 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), | |
1229 | " .auth_mode = %d\n", sec->auth_mode); | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | static void ieee_init(struct ieee80211_device *ieee) | |
1234 | { | |
1235 | ieee->mode = IEEE_B | IEEE_G; | |
1236 | ieee->freq_band = IEEE80211_24GHZ_BAND; | |
1237 | ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION; | |
1238 | ieee->tx_headroom = sizeof(struct zd_ctrlset); | |
1239 | ieee->set_security = set_security; | |
1240 | ieee->hard_start_xmit = netdev_tx; | |
1241 | ||
1242 | /* Software encryption/decryption for now */ | |
1243 | ieee->host_build_iv = 0; | |
1244 | ieee->host_encrypt = 1; | |
1245 | ieee->host_decrypt = 1; | |
1246 | ||
1247 | /* FIXME: default to managed mode, until ieee80211 and zd1211rw can | |
1248 | * correctly support AUTO */ | |
1249 | ieee->iw_mode = IW_MODE_INFRA; | |
1250 | } | |
1251 | ||
1252 | static void softmac_init(struct ieee80211softmac_device *sm) | |
1253 | { | |
1254 | sm->set_channel = set_channel; | |
b1382ede | 1255 | sm->bssinfo_change = bssinfo_change; |
e85d0918 DD |
1256 | } |
1257 | ||
1258 | struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev) | |
1259 | { | |
1260 | struct zd_mac *mac = zd_netdev_mac(ndev); | |
1261 | struct iw_statistics *iw_stats = &mac->iw_stats; | |
db888aed | 1262 | unsigned int i, count, qual_total, rssi_total; |
e85d0918 DD |
1263 | |
1264 | memset(iw_stats, 0, sizeof(struct iw_statistics)); | |
1265 | /* We are not setting the status, because ieee->state is not updated | |
1266 | * at all and this driver doesn't track authentication state. | |
1267 | */ | |
1268 | spin_lock_irq(&mac->lock); | |
db888aed UK |
1269 | count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ? |
1270 | mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE; | |
1271 | qual_total = rssi_total = 0; | |
1272 | for (i = 0; i < count; i++) { | |
1273 | qual_total += mac->qual_buffer[i]; | |
1274 | rssi_total += mac->rssi_buffer[i]; | |
1275 | } | |
e85d0918 | 1276 | spin_unlock_irq(&mac->lock); |
db888aed UK |
1277 | iw_stats->qual.updated = IW_QUAL_NOISE_INVALID; |
1278 | if (count > 0) { | |
1279 | iw_stats->qual.qual = qual_total / count; | |
1280 | iw_stats->qual.level = rssi_total / count; | |
1281 | iw_stats->qual.updated |= | |
1282 | IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED; | |
1283 | } else { | |
1284 | iw_stats->qual.updated |= | |
1285 | IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID; | |
1286 | } | |
e85d0918 DD |
1287 | /* TODO: update counter */ |
1288 | return iw_stats; | |
1289 | } | |
1290 | ||
583afd1e UK |
1291 | #define LINK_LED_WORK_DELAY HZ |
1292 | ||
c4028958 | 1293 | static void link_led_handler(struct work_struct *work) |
583afd1e | 1294 | { |
c4028958 DH |
1295 | struct zd_mac *mac = |
1296 | container_of(work, struct zd_mac, housekeeping.link_led_work.work); | |
583afd1e UK |
1297 | struct zd_chip *chip = &mac->chip; |
1298 | struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev); | |
1299 | int is_associated; | |
1300 | int r; | |
1301 | ||
1302 | spin_lock_irq(&mac->lock); | |
41072a1b | 1303 | is_associated = sm->associnfo.associated != 0; |
583afd1e UK |
1304 | spin_unlock_irq(&mac->lock); |
1305 | ||
1306 | r = zd_chip_control_leds(chip, | |
1307 | is_associated ? LED_ASSOCIATED : LED_SCANNING); | |
1308 | if (r) | |
1309 | dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); | |
1310 | ||
1311 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1312 | LINK_LED_WORK_DELAY); | |
1313 | } | |
1314 | ||
1315 | static void housekeeping_init(struct zd_mac *mac) | |
1316 | { | |
c4028958 | 1317 | INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); |
583afd1e UK |
1318 | } |
1319 | ||
1320 | static void housekeeping_enable(struct zd_mac *mac) | |
1321 | { | |
1322 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1323 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1324 | 0); | |
1325 | } | |
1326 | ||
1327 | static void housekeeping_disable(struct zd_mac *mac) | |
1328 | { | |
1329 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1330 | cancel_rearming_delayed_workqueue(zd_workqueue, | |
1331 | &mac->housekeeping.link_led_work); | |
1332 | zd_chip_control_leds(&mac->chip, LED_OFF); | |
1333 | } |