Commit | Line | Data |
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1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
66bb42fd | 2 | /* ZD1211 USB-WLAN driver for Linux |
459c51ad | 3 | * |
66bb42fd DD |
4 | * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de> |
5 | * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org> | |
6 | * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net> | |
e83a1070 | 7 | * Copyright (C) 2007-2008 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu> |
e85d0918 DD |
8 | */ |
9 | ||
10 | #include <linux/netdevice.h> | |
11 | #include <linux/etherdevice.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
e85d0918 DD |
13 | #include <linux/usb.h> |
14 | #include <linux/jiffies.h> | |
15 | #include <net/ieee80211_radiotap.h> | |
16 | ||
17 | #include "zd_def.h" | |
18 | #include "zd_chip.h" | |
19 | #include "zd_mac.h" | |
e85d0918 | 20 | #include "zd_rf.h" |
e85d0918 | 21 | |
e83a1070 LR |
22 | struct zd_reg_alpha2_map { |
23 | u32 reg; | |
24 | char alpha2[2]; | |
25 | }; | |
26 | ||
27 | static struct zd_reg_alpha2_map reg_alpha2_map[] = { | |
28 | { ZD_REGDOMAIN_FCC, "US" }, | |
29 | { ZD_REGDOMAIN_IC, "CA" }, | |
30 | { ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */ | |
31 | { ZD_REGDOMAIN_JAPAN, "JP" }, | |
3d3b33bd JL |
32 | { ZD_REGDOMAIN_JAPAN_2, "JP" }, |
33 | { ZD_REGDOMAIN_JAPAN_3, "JP" }, | |
e83a1070 LR |
34 | { ZD_REGDOMAIN_SPAIN, "ES" }, |
35 | { ZD_REGDOMAIN_FRANCE, "FR" }, | |
36 | }; | |
37 | ||
459c51ad DD |
38 | /* This table contains the hardware specific values for the modulation rates. */ |
39 | static const struct ieee80211_rate zd_rates[] = { | |
8318d78a JB |
40 | { .bitrate = 10, |
41 | .hw_value = ZD_CCK_RATE_1M, }, | |
42 | { .bitrate = 20, | |
43 | .hw_value = ZD_CCK_RATE_2M, | |
44 | .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT, | |
45 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
46 | { .bitrate = 55, | |
47 | .hw_value = ZD_CCK_RATE_5_5M, | |
48 | .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT, | |
49 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
50 | { .bitrate = 110, | |
51 | .hw_value = ZD_CCK_RATE_11M, | |
52 | .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT, | |
53 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
54 | { .bitrate = 60, | |
55 | .hw_value = ZD_OFDM_RATE_6M, | |
56 | .flags = 0 }, | |
57 | { .bitrate = 90, | |
58 | .hw_value = ZD_OFDM_RATE_9M, | |
59 | .flags = 0 }, | |
60 | { .bitrate = 120, | |
61 | .hw_value = ZD_OFDM_RATE_12M, | |
62 | .flags = 0 }, | |
63 | { .bitrate = 180, | |
64 | .hw_value = ZD_OFDM_RATE_18M, | |
65 | .flags = 0 }, | |
66 | { .bitrate = 240, | |
67 | .hw_value = ZD_OFDM_RATE_24M, | |
68 | .flags = 0 }, | |
69 | { .bitrate = 360, | |
70 | .hw_value = ZD_OFDM_RATE_36M, | |
71 | .flags = 0 }, | |
72 | { .bitrate = 480, | |
73 | .hw_value = ZD_OFDM_RATE_48M, | |
74 | .flags = 0 }, | |
75 | { .bitrate = 540, | |
76 | .hw_value = ZD_OFDM_RATE_54M, | |
77 | .flags = 0 }, | |
459c51ad DD |
78 | }; |
79 | ||
7f4013f0 BP |
80 | /* |
81 | * Zydas retry rates table. Each line is listed in the same order as | |
82 | * in zd_rates[] and contains all the rate used when a packet is sent | |
83 | * starting with a given rates. Let's consider an example : | |
84 | * | |
85 | * "11 Mbits : 4, 3, 2, 1, 0" means : | |
86 | * - packet is sent using 4 different rates | |
87 | * - 1st rate is index 3 (ie 11 Mbits) | |
88 | * - 2nd rate is index 2 (ie 5.5 Mbits) | |
89 | * - 3rd rate is index 1 (ie 2 Mbits) | |
90 | * - 4th rate is index 0 (ie 1 Mbits) | |
91 | */ | |
92 | ||
93 | static const struct tx_retry_rate zd_retry_rates[] = { | |
94 | { /* 1 Mbits */ 1, { 0 }}, | |
95 | { /* 2 Mbits */ 2, { 1, 0 }}, | |
96 | { /* 5.5 Mbits */ 3, { 2, 1, 0 }}, | |
97 | { /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, | |
98 | { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, | |
99 | { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, | |
100 | { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, | |
101 | { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, | |
102 | { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, | |
103 | { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, | |
104 | { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, | |
105 | { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} | |
106 | }; | |
107 | ||
459c51ad | 108 | static const struct ieee80211_channel zd_channels[] = { |
8318d78a JB |
109 | { .center_freq = 2412, .hw_value = 1 }, |
110 | { .center_freq = 2417, .hw_value = 2 }, | |
111 | { .center_freq = 2422, .hw_value = 3 }, | |
112 | { .center_freq = 2427, .hw_value = 4 }, | |
113 | { .center_freq = 2432, .hw_value = 5 }, | |
114 | { .center_freq = 2437, .hw_value = 6 }, | |
115 | { .center_freq = 2442, .hw_value = 7 }, | |
116 | { .center_freq = 2447, .hw_value = 8 }, | |
117 | { .center_freq = 2452, .hw_value = 9 }, | |
118 | { .center_freq = 2457, .hw_value = 10 }, | |
119 | { .center_freq = 2462, .hw_value = 11 }, | |
120 | { .center_freq = 2467, .hw_value = 12 }, | |
121 | { .center_freq = 2472, .hw_value = 13 }, | |
122 | { .center_freq = 2484, .hw_value = 14 }, | |
459c51ad | 123 | }; |
e85d0918 | 124 | |
583afd1e UK |
125 | static void housekeeping_init(struct zd_mac *mac); |
126 | static void housekeeping_enable(struct zd_mac *mac); | |
127 | static void housekeeping_disable(struct zd_mac *mac); | |
9be23256 JK |
128 | static void beacon_init(struct zd_mac *mac); |
129 | static void beacon_enable(struct zd_mac *mac); | |
130 | static void beacon_disable(struct zd_mac *mac); | |
212e1a5b JK |
131 | static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble); |
132 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, | |
dde4673b | 133 | struct sk_buff *beacon, bool in_intr); |
583afd1e | 134 | |
e83a1070 LR |
135 | static int zd_reg2alpha2(u8 regdomain, char *alpha2) |
136 | { | |
137 | unsigned int i; | |
138 | struct zd_reg_alpha2_map *reg_map; | |
139 | for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { | |
140 | reg_map = ®_alpha2_map[i]; | |
141 | if (regdomain == reg_map->reg) { | |
142 | alpha2[0] = reg_map->alpha2[0]; | |
143 | alpha2[1] = reg_map->alpha2[1]; | |
144 | return 0; | |
145 | } | |
146 | } | |
147 | return 1; | |
148 | } | |
149 | ||
7a1d6564 JK |
150 | static int zd_check_signal(struct ieee80211_hw *hw, int signal) |
151 | { | |
152 | struct zd_mac *mac = zd_hw_mac(hw); | |
153 | ||
154 | dev_dbg_f_cond(zd_mac_dev(mac), signal < 0 || signal > 100, | |
155 | "%s: signal value from device not in range 0..100, " | |
156 | "but %d.\n", __func__, signal); | |
157 | ||
158 | if (signal < 0) | |
159 | signal = 0; | |
160 | else if (signal > 100) | |
161 | signal = 100; | |
162 | ||
163 | return signal; | |
164 | } | |
165 | ||
459c51ad | 166 | int zd_mac_preinit_hw(struct ieee80211_hw *hw) |
e85d0918 DD |
167 | { |
168 | int r; | |
e85d0918 | 169 | u8 addr[ETH_ALEN]; |
459c51ad | 170 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed DD |
171 | |
172 | r = zd_chip_read_mac_addr_fw(&mac->chip, addr); | |
173 | if (r) | |
174 | return r; | |
175 | ||
459c51ad DD |
176 | SET_IEEE80211_PERM_ADDR(hw, addr); |
177 | ||
74553aed DD |
178 | return 0; |
179 | } | |
180 | ||
459c51ad | 181 | int zd_mac_init_hw(struct ieee80211_hw *hw) |
74553aed DD |
182 | { |
183 | int r; | |
459c51ad | 184 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed | 185 | struct zd_chip *chip = &mac->chip; |
e83a1070 | 186 | char alpha2[2]; |
e85d0918 DD |
187 | u8 default_regdomain; |
188 | ||
189 | r = zd_chip_enable_int(chip); | |
190 | if (r) | |
191 | goto out; | |
74553aed | 192 | r = zd_chip_init_hw(chip); |
e85d0918 DD |
193 | if (r) |
194 | goto disable_int; | |
195 | ||
e85d0918 | 196 | ZD_ASSERT(!irqs_disabled()); |
e85d0918 DD |
197 | |
198 | r = zd_read_regdomain(chip, &default_regdomain); | |
199 | if (r) | |
200 | goto disable_int; | |
e85d0918 DD |
201 | spin_lock_irq(&mac->lock); |
202 | mac->regdomain = mac->default_regdomain = default_regdomain; | |
203 | spin_unlock_irq(&mac->lock); | |
e85d0918 | 204 | |
40da08bc DD |
205 | /* We must inform the device that we are doing encryption/decryption in |
206 | * software at the moment. */ | |
207 | r = zd_set_encryption_type(chip, ENC_SNIFFER); | |
e85d0918 DD |
208 | if (r) |
209 | goto disable_int; | |
210 | ||
e83a1070 | 211 | r = zd_reg2alpha2(mac->regdomain, alpha2); |
fe33eb39 LR |
212 | if (r) |
213 | goto disable_int; | |
e85d0918 | 214 | |
fe33eb39 | 215 | r = regulatory_hint(hw->wiphy, alpha2); |
e85d0918 DD |
216 | disable_int: |
217 | zd_chip_disable_int(chip); | |
218 | out: | |
219 | return r; | |
220 | } | |
221 | ||
222 | void zd_mac_clear(struct zd_mac *mac) | |
223 | { | |
9cdac965 | 224 | flush_workqueue(zd_workqueue); |
e85d0918 | 225 | zd_chip_clear(&mac->chip); |
c48cf125 | 226 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); |
e85d0918 DD |
227 | } |
228 | ||
c5691235 | 229 | static int set_rx_filter(struct zd_mac *mac) |
e85d0918 | 230 | { |
459c51ad DD |
231 | unsigned long flags; |
232 | u32 filter = STA_RX_FILTER; | |
e85d0918 | 233 | |
459c51ad DD |
234 | spin_lock_irqsave(&mac->lock, flags); |
235 | if (mac->pass_ctrl) | |
236 | filter |= RX_FILTER_CTRL; | |
237 | spin_unlock_irqrestore(&mac->lock, flags); | |
238 | ||
239 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); | |
c5691235 UK |
240 | } |
241 | ||
c2fadcb3 JK |
242 | static int set_mac_and_bssid(struct zd_mac *mac) |
243 | { | |
244 | int r; | |
245 | ||
246 | if (!mac->vif) | |
247 | return -1; | |
248 | ||
249 | r = zd_write_mac_addr(&mac->chip, mac->vif->addr); | |
250 | if (r) | |
251 | return r; | |
252 | ||
253 | /* Vendor driver after setting MAC either sets BSSID for AP or | |
254 | * filter for other modes. | |
255 | */ | |
256 | if (mac->type != NL80211_IFTYPE_AP) | |
257 | return set_rx_filter(mac); | |
258 | else | |
259 | return zd_write_bssid(&mac->chip, mac->vif->addr); | |
260 | } | |
261 | ||
c5691235 UK |
262 | static int set_mc_hash(struct zd_mac *mac) |
263 | { | |
264 | struct zd_mc_hash hash; | |
c5691235 | 265 | zd_mc_clear(&hash); |
c5691235 UK |
266 | return zd_chip_set_multicast_hash(&mac->chip, &hash); |
267 | } | |
268 | ||
a0fd751f | 269 | int zd_op_start(struct ieee80211_hw *hw) |
e85d0918 | 270 | { |
459c51ad | 271 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 272 | struct zd_chip *chip = &mac->chip; |
74553aed | 273 | struct zd_usb *usb = &chip->usb; |
e85d0918 DD |
274 | int r; |
275 | ||
74553aed DD |
276 | if (!usb->initialized) { |
277 | r = zd_usb_init_hw(usb); | |
278 | if (r) | |
279 | goto out; | |
280 | } | |
281 | ||
e85d0918 DD |
282 | r = zd_chip_enable_int(chip); |
283 | if (r < 0) | |
284 | goto out; | |
285 | ||
286 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); | |
287 | if (r < 0) | |
288 | goto disable_int; | |
c5691235 | 289 | r = set_rx_filter(mac); |
c5691235 UK |
290 | if (r) |
291 | goto disable_int; | |
292 | r = set_mc_hash(mac); | |
e85d0918 DD |
293 | if (r) |
294 | goto disable_int; | |
02f1434d FF |
295 | |
296 | /* Wait after setting the multicast hash table and powering on | |
297 | * the radio otherwise interface bring up will fail. This matches | |
298 | * what the vendor driver did. | |
299 | */ | |
300 | msleep(10); | |
301 | ||
e85d0918 | 302 | r = zd_chip_switch_radio_on(chip); |
02f1434d FF |
303 | if (r < 0) { |
304 | dev_err(zd_chip_dev(chip), | |
305 | "%s: failed to set radio on\n", __func__); | |
e85d0918 | 306 | goto disable_int; |
02f1434d | 307 | } |
459c51ad | 308 | r = zd_chip_enable_rxtx(chip); |
e85d0918 DD |
309 | if (r < 0) |
310 | goto disable_radio; | |
311 | r = zd_chip_enable_hwint(chip); | |
312 | if (r < 0) | |
459c51ad | 313 | goto disable_rxtx; |
e85d0918 | 314 | |
583afd1e | 315 | housekeeping_enable(mac); |
9be23256 JK |
316 | beacon_enable(mac); |
317 | set_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
e85d0918 | 318 | return 0; |
459c51ad DD |
319 | disable_rxtx: |
320 | zd_chip_disable_rxtx(chip); | |
e85d0918 DD |
321 | disable_radio: |
322 | zd_chip_switch_radio_off(chip); | |
323 | disable_int: | |
324 | zd_chip_disable_int(chip); | |
325 | out: | |
326 | return r; | |
327 | } | |
328 | ||
1decf05d | 329 | void zd_op_stop(struct ieee80211_hw *hw, bool suspend) |
459c51ad DD |
330 | { |
331 | struct zd_mac *mac = zd_hw_mac(hw); | |
332 | struct zd_chip *chip = &mac->chip; | |
333 | struct sk_buff *skb; | |
334 | struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; | |
c9a4b35d | 335 | |
9be23256 JK |
336 | clear_bit(ZD_DEVICE_RUNNING, &mac->flags); |
337 | ||
459c51ad | 338 | /* The order here deliberately is a little different from the open() |
e85d0918 | 339 | * method, since we need to make sure there is no opportunity for RX |
459c51ad | 340 | * frames to be processed by mac80211 after we have stopped it. |
e85d0918 DD |
341 | */ |
342 | ||
459c51ad | 343 | zd_chip_disable_rxtx(chip); |
9be23256 | 344 | beacon_disable(mac); |
583afd1e | 345 | housekeeping_disable(mac); |
b1382ede | 346 | flush_workqueue(zd_workqueue); |
b1382ede | 347 | |
e85d0918 DD |
348 | zd_chip_disable_hwint(chip); |
349 | zd_chip_switch_radio_off(chip); | |
350 | zd_chip_disable_int(chip); | |
351 | ||
e85d0918 | 352 | |
459c51ad | 353 | while ((skb = skb_dequeue(ack_wait_queue))) |
e039fa4a | 354 | dev_kfree_skb_any(skb); |
e85d0918 DD |
355 | } |
356 | ||
212e1a5b JK |
357 | int zd_restore_settings(struct zd_mac *mac) |
358 | { | |
359 | struct sk_buff *beacon; | |
360 | struct zd_mc_hash multicast_hash; | |
361 | unsigned int short_preamble; | |
362 | int r, beacon_interval, beacon_period; | |
363 | u8 channel; | |
364 | ||
365 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
366 | ||
367 | spin_lock_irq(&mac->lock); | |
368 | multicast_hash = mac->multicast_hash; | |
369 | short_preamble = mac->short_preamble; | |
370 | beacon_interval = mac->beacon.interval; | |
371 | beacon_period = mac->beacon.period; | |
372 | channel = mac->channel; | |
373 | spin_unlock_irq(&mac->lock); | |
374 | ||
375 | r = set_mac_and_bssid(mac); | |
376 | if (r < 0) { | |
377 | dev_dbg_f(zd_mac_dev(mac), "set_mac_and_bssid failed, %d\n", r); | |
378 | return r; | |
379 | } | |
380 | ||
381 | r = zd_chip_set_channel(&mac->chip, channel); | |
382 | if (r < 0) { | |
383 | dev_dbg_f(zd_mac_dev(mac), "zd_chip_set_channel failed, %d\n", | |
384 | r); | |
385 | return r; | |
386 | } | |
387 | ||
388 | set_rts_cts(mac, short_preamble); | |
389 | ||
390 | r = zd_chip_set_multicast_hash(&mac->chip, &multicast_hash); | |
391 | if (r < 0) { | |
392 | dev_dbg_f(zd_mac_dev(mac), | |
393 | "zd_chip_set_multicast_hash failed, %d\n", r); | |
394 | return r; | |
395 | } | |
396 | ||
397 | if (mac->type == NL80211_IFTYPE_MESH_POINT || | |
398 | mac->type == NL80211_IFTYPE_ADHOC || | |
399 | mac->type == NL80211_IFTYPE_AP) { | |
400 | if (mac->vif != NULL) { | |
6e8912a5 | 401 | beacon = ieee80211_beacon_get(mac->hw, mac->vif, 0); |
f762d8c3 | 402 | if (beacon) |
dde4673b | 403 | zd_mac_config_beacon(mac->hw, beacon, false); |
212e1a5b JK |
404 | } |
405 | ||
406 | zd_set_beacon_interval(&mac->chip, beacon_interval, | |
407 | beacon_period, mac->type); | |
408 | ||
409 | spin_lock_irq(&mac->lock); | |
410 | mac->beacon.last_update = jiffies; | |
411 | spin_unlock_irq(&mac->lock); | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
459c51ad | 417 | /** |
7f4013f0 | 418 | * zd_mac_tx_status - reports tx status of a packet if required |
f3242a5b LJ |
419 | * @hw: a &struct ieee80211_hw pointer |
420 | * @skb: a sk-buffer | |
e039fa4a | 421 | * @ackssi: ACK signal strength |
f3242a5b | 422 | * @tx_status: success and/or retry |
459c51ad DD |
423 | * |
424 | * This information calls ieee80211_tx_status_irqsafe() if required by the | |
425 | * control information. It copies the control information into the status | |
426 | * information. | |
427 | * | |
428 | * If no status information has been requested, the skb is freed. | |
429 | */ | |
7f4013f0 BP |
430 | static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
431 | int ackssi, struct tx_status *tx_status) | |
b1382ede | 432 | { |
e039fa4a | 433 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7f4013f0 BP |
434 | int i; |
435 | int success = 1, retry = 1; | |
436 | int first_idx; | |
437 | const struct tx_retry_rate *retries; | |
e039fa4a | 438 | |
e6a9854b | 439 | ieee80211_tx_info_clear_status(info); |
b1382ede | 440 | |
7f4013f0 BP |
441 | if (tx_status) { |
442 | success = !tx_status->failure; | |
443 | retry = tx_status->retry + success; | |
444 | } | |
445 | ||
446 | if (success) { | |
447 | /* success */ | |
e6a9854b | 448 | info->flags |= IEEE80211_TX_STAT_ACK; |
7f4013f0 BP |
449 | } else { |
450 | /* failure */ | |
451 | info->flags &= ~IEEE80211_TX_STAT_ACK; | |
452 | } | |
453 | ||
454 | first_idx = info->status.rates[0].idx; | |
455 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
456 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 457 | ZD_ASSERT(1 <= retry && retry <= retries->count); |
7f4013f0 BP |
458 | |
459 | info->status.rates[0].idx = retries->rate[0]; | |
460 | info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); | |
461 | ||
462 | for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { | |
463 | info->status.rates[i].idx = retries->rate[i]; | |
464 | info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); | |
465 | } | |
466 | for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { | |
86baf712 | 467 | info->status.rates[i].idx = retries->rate[retry - 1]; |
7f4013f0 BP |
468 | info->status.rates[i].count = 1; // (success ? 1:2); |
469 | } | |
470 | if (i<IEEE80211_TX_MAX_RATES) | |
471 | info->status.rates[i].idx = -1; /* terminate */ | |
472 | ||
7a1d6564 | 473 | info->status.ack_signal = zd_check_signal(hw, ackssi); |
e039fa4a | 474 | ieee80211_tx_status_irqsafe(hw, skb); |
b1382ede DD |
475 | } |
476 | ||
459c51ad DD |
477 | /** |
478 | * zd_mac_tx_failed - callback for failed frames | |
f3242a5b | 479 | * @urb: pointer to the urb structure |
459c51ad | 480 | * |
303863f4 | 481 | * This function is called if a frame couldn't be successfully |
459c51ad DD |
482 | * transferred. The first frame from the tx queue, will be selected and |
483 | * reported as error to the upper layers. | |
484 | */ | |
7f4013f0 | 485 | void zd_mac_tx_failed(struct urb *urb) |
b1382ede | 486 | { |
7f4013f0 BP |
487 | struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); |
488 | struct zd_mac *mac = zd_hw_mac(hw); | |
489 | struct sk_buff_head *q = &mac->ack_wait_queue; | |
459c51ad | 490 | struct sk_buff *skb; |
7f4013f0 BP |
491 | struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; |
492 | unsigned long flags; | |
493 | int success = !tx_status->failure; | |
494 | int retry = tx_status->retry + success; | |
495 | int found = 0; | |
496 | int i, position = 0; | |
b1382ede | 497 | |
7f4013f0 BP |
498 | spin_lock_irqsave(&q->lock, flags); |
499 | ||
500 | skb_queue_walk(q, skb) { | |
501 | struct ieee80211_hdr *tx_hdr; | |
502 | struct ieee80211_tx_info *info; | |
503 | int first_idx, final_idx; | |
504 | const struct tx_retry_rate *retries; | |
505 | u8 final_rate; | |
506 | ||
507 | position ++; | |
508 | ||
509 | /* if the hardware reports a failure and we had a 802.11 ACK | |
510 | * pending, then we skip the first skb when searching for a | |
511 | * matching frame */ | |
512 | if (tx_status->failure && mac->ack_pending && | |
513 | skb_queue_is_first(q, skb)) { | |
514 | continue; | |
515 | } | |
516 | ||
517 | tx_hdr = (struct ieee80211_hdr *)skb->data; | |
518 | ||
519 | /* we skip all frames not matching the reported destination */ | |
c15975ac | 520 | if (unlikely(!ether_addr_equal(tx_hdr->addr1, tx_status->mac))) |
7f4013f0 | 521 | continue; |
7f4013f0 BP |
522 | |
523 | /* we skip all frames not matching the reported final rate */ | |
5078ed50 | 524 | |
7f4013f0 BP |
525 | info = IEEE80211_SKB_CB(skb); |
526 | first_idx = info->status.rates[0].idx; | |
527 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
528 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 529 | if (retry <= 0 || retry > retries->count) |
7f4013f0 | 530 | continue; |
7f4013f0 | 531 | |
86baf712 | 532 | final_idx = retries->rate[retry - 1]; |
7f4013f0 BP |
533 | final_rate = zd_rates[final_idx].hw_value; |
534 | ||
535 | if (final_rate != tx_status->rate) { | |
536 | continue; | |
537 | } | |
538 | ||
539 | found = 1; | |
540 | break; | |
541 | } | |
542 | ||
543 | if (found) { | |
544 | for (i=1; i<=position; i++) { | |
545 | skb = __skb_dequeue(q); | |
546 | zd_mac_tx_status(hw, skb, | |
547 | mac->ack_pending ? mac->ack_signal : 0, | |
548 | i == position ? tx_status : NULL); | |
549 | mac->ack_pending = 0; | |
550 | } | |
551 | } | |
552 | ||
553 | spin_unlock_irqrestore(&q->lock, flags); | |
b1382ede DD |
554 | } |
555 | ||
459c51ad DD |
556 | /** |
557 | * zd_mac_tx_to_dev - callback for USB layer | |
558 | * @skb: a &sk_buff pointer | |
559 | * @error: error value, 0 if transmission successful | |
560 | * | |
561 | * Informs the MAC layer that the frame has successfully transferred to the | |
562 | * device. If an ACK is required and the transfer to the device has been | |
563 | * successful, the packets are put on the @ack_wait_queue with | |
564 | * the control set removed. | |
565 | */ | |
566 | void zd_mac_tx_to_dev(struct sk_buff *skb, int error) | |
567 | { | |
e039fa4a | 568 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b | 569 | struct ieee80211_hw *hw = info->rate_driver_data[0]; |
7f4013f0 BP |
570 | struct zd_mac *mac = zd_hw_mac(hw); |
571 | ||
572 | ieee80211_tx_info_clear_status(info); | |
b1382ede | 573 | |
e039fa4a JB |
574 | skb_pull(skb, sizeof(struct zd_ctrlset)); |
575 | if (unlikely(error || | |
576 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) { | |
7f4013f0 BP |
577 | /* |
578 | * FIXME : do we need to fill in anything ? | |
579 | */ | |
580 | ieee80211_tx_status_irqsafe(hw, skb); | |
459c51ad | 581 | } else { |
7f4013f0 | 582 | struct sk_buff_head *q = &mac->ack_wait_queue; |
e039fa4a JB |
583 | |
584 | skb_queue_tail(q, skb); | |
7f4013f0 BP |
585 | while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { |
586 | zd_mac_tx_status(hw, skb_dequeue(q), | |
587 | mac->ack_pending ? mac->ack_signal : 0, | |
588 | NULL); | |
589 | mac->ack_pending = 0; | |
590 | } | |
e85d0918 | 591 | } |
e85d0918 DD |
592 | } |
593 | ||
b1cd8416 | 594 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
e85d0918 | 595 | { |
64f222cc | 596 | /* ZD_PURE_RATE() must be used to remove the modulation type flag of |
459c51ad DD |
597 | * the zd-rate values. |
598 | */ | |
e85d0918 | 599 | static const u8 rate_divisor[] = { |
459c51ad DD |
600 | [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1, |
601 | [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2, | |
602 | /* Bits must be doubled. */ | |
603 | [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11, | |
604 | [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11, | |
605 | [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6, | |
606 | [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9, | |
607 | [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12, | |
608 | [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18, | |
609 | [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24, | |
610 | [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36, | |
611 | [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48, | |
612 | [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54, | |
e85d0918 DD |
613 | }; |
614 | ||
615 | u32 bits = (u32)tx_length * 8; | |
616 | u32 divisor; | |
617 | ||
64f222cc | 618 | divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; |
e85d0918 DD |
619 | if (divisor == 0) |
620 | return -EINVAL; | |
621 | ||
b1cd8416 DD |
622 | switch (zd_rate) { |
623 | case ZD_CCK_RATE_5_5M: | |
e85d0918 DD |
624 | bits = (2*bits) + 10; /* round up to the next integer */ |
625 | break; | |
b1cd8416 | 626 | case ZD_CCK_RATE_11M: |
e85d0918 DD |
627 | if (service) { |
628 | u32 t = bits % 11; | |
629 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
630 | if (0 < t && t <= 3) { | |
631 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
632 | } | |
633 | } | |
634 | bits += 10; /* round up to the next integer */ | |
635 | break; | |
636 | } | |
637 | ||
638 | return bits/divisor; | |
639 | } | |
640 | ||
e85d0918 | 641 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, |
e6a9854b JB |
642 | struct ieee80211_hdr *header, |
643 | struct ieee80211_tx_info *info) | |
e85d0918 | 644 | { |
e85d0918 | 645 | /* |
b1382ede | 646 | * CONTROL TODO: |
e85d0918 DD |
647 | * - if backoff needed, enable bit 0 |
648 | * - if burst (backoff not needed) disable bit 0 | |
e85d0918 DD |
649 | */ |
650 | ||
651 | cs->control = 0; | |
652 | ||
653 | /* First fragment */ | |
e6a9854b | 654 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
e85d0918 DD |
655 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; |
656 | ||
13bdcd90 GS |
657 | /* No ACK expected (multicast, etc.) */ |
658 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
659 | cs->control |= ZD_CS_NO_ACK; | |
e85d0918 DD |
660 | |
661 | /* PS-POLL */ | |
85365820 | 662 | if (ieee80211_is_pspoll(header->frame_control)) |
e85d0918 DD |
663 | cs->control |= ZD_CS_PS_POLL_FRAME; |
664 | ||
e6a9854b | 665 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b1382ede DD |
666 | cs->control |= ZD_CS_RTS; |
667 | ||
e6a9854b | 668 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
b1382ede | 669 | cs->control |= ZD_CS_SELF_CTS; |
e85d0918 DD |
670 | |
671 | /* FIXME: Management frame? */ | |
672 | } | |
673 | ||
f762d8c3 JK |
674 | static bool zd_mac_match_cur_beacon(struct zd_mac *mac, struct sk_buff *beacon) |
675 | { | |
676 | if (!mac->beacon.cur_beacon) | |
677 | return false; | |
678 | ||
679 | if (mac->beacon.cur_beacon->len != beacon->len) | |
680 | return false; | |
681 | ||
682 | return !memcmp(beacon->data, mac->beacon.cur_beacon->data, beacon->len); | |
683 | } | |
684 | ||
685 | static void zd_mac_free_cur_beacon_locked(struct zd_mac *mac) | |
686 | { | |
687 | ZD_ASSERT(mutex_is_locked(&mac->chip.mutex)); | |
688 | ||
689 | kfree_skb(mac->beacon.cur_beacon); | |
690 | mac->beacon.cur_beacon = NULL; | |
691 | } | |
692 | ||
693 | static void zd_mac_free_cur_beacon(struct zd_mac *mac) | |
694 | { | |
695 | mutex_lock(&mac->chip.mutex); | |
696 | zd_mac_free_cur_beacon_locked(mac); | |
697 | mutex_unlock(&mac->chip.mutex); | |
698 | } | |
699 | ||
dde4673b JK |
700 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon, |
701 | bool in_intr) | |
72e77a8a LCC |
702 | { |
703 | struct zd_mac *mac = zd_hw_mac(hw); | |
51272292 | 704 | int r, ret, num_cmds, req_pos = 0; |
72e77a8a LCC |
705 | u32 tmp, j = 0; |
706 | /* 4 more bytes for tail CRC */ | |
707 | u32 full_len = beacon->len + 4; | |
9be23256 | 708 | unsigned long end_jiffies, message_jiffies; |
51272292 JK |
709 | struct zd_ioreq32 *ioreqs; |
710 | ||
f762d8c3 JK |
711 | mutex_lock(&mac->chip.mutex); |
712 | ||
713 | /* Check if hw already has this beacon. */ | |
714 | if (zd_mac_match_cur_beacon(mac, beacon)) { | |
715 | r = 0; | |
716 | goto out_nofree; | |
717 | } | |
718 | ||
51272292 JK |
719 | /* Alloc memory for full beacon write at once. */ |
720 | num_cmds = 1 + zd_chip_is_zd1211b(&mac->chip) + full_len; | |
6da2ec56 KC |
721 | ioreqs = kmalloc_array(num_cmds, sizeof(struct zd_ioreq32), |
722 | GFP_KERNEL); | |
f762d8c3 JK |
723 | if (!ioreqs) { |
724 | r = -ENOMEM; | |
725 | goto out_nofree; | |
726 | } | |
f2cae6c5 | 727 | |
9be23256 | 728 | r = zd_iowrite32_locked(&mac->chip, 0, CR_BCN_FIFO_SEMAPHORE); |
f2cae6c5 | 729 | if (r < 0) |
9be23256 JK |
730 | goto out; |
731 | r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); | |
f2cae6c5 | 732 | if (r < 0) |
9be23256 | 733 | goto release_sema; |
dde4673b JK |
734 | if (in_intr && tmp & 0x2) { |
735 | r = -EBUSY; | |
736 | goto release_sema; | |
737 | } | |
f2cae6c5 | 738 | |
9be23256 JK |
739 | end_jiffies = jiffies + HZ / 2; /*~500ms*/ |
740 | message_jiffies = jiffies + HZ / 10; /*~100ms*/ | |
72e77a8a | 741 | while (tmp & 0x2) { |
9be23256 | 742 | r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); |
f2cae6c5 | 743 | if (r < 0) |
9be23256 JK |
744 | goto release_sema; |
745 | if (time_is_before_eq_jiffies(message_jiffies)) { | |
746 | message_jiffies = jiffies + HZ / 10; | |
747 | dev_err(zd_mac_dev(mac), | |
748 | "CR_BCN_FIFO_SEMAPHORE not ready\n"); | |
749 | if (time_is_before_eq_jiffies(end_jiffies)) { | |
750 | dev_err(zd_mac_dev(mac), | |
751 | "Giving up beacon config.\n"); | |
752 | r = -ETIMEDOUT; | |
3985a465 | 753 | goto reset_device; |
72e77a8a LCC |
754 | } |
755 | } | |
9be23256 | 756 | msleep(20); |
72e77a8a LCC |
757 | } |
758 | ||
51272292 JK |
759 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
760 | ioreqs[req_pos].value = full_len - 1; | |
761 | req_pos++; | |
f2cae6c5 | 762 | if (zd_chip_is_zd1211b(&mac->chip)) { |
51272292 JK |
763 | ioreqs[req_pos].addr = CR_BCN_LENGTH; |
764 | ioreqs[req_pos].value = full_len - 1; | |
765 | req_pos++; | |
f2cae6c5 | 766 | } |
72e77a8a | 767 | |
f2cae6c5 | 768 | for (j = 0 ; j < beacon->len; j++) { |
51272292 JK |
769 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
770 | ioreqs[req_pos].value = *((u8 *)(beacon->data + j)); | |
771 | req_pos++; | |
f2cae6c5 | 772 | } |
72e77a8a | 773 | |
f2cae6c5 | 774 | for (j = 0; j < 4; j++) { |
51272292 JK |
775 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
776 | ioreqs[req_pos].value = 0x0; | |
777 | req_pos++; | |
f2cae6c5 DD |
778 | } |
779 | ||
51272292 JK |
780 | BUG_ON(req_pos != num_cmds); |
781 | ||
782 | r = zd_iowrite32a_locked(&mac->chip, ioreqs, num_cmds); | |
783 | ||
9be23256 JK |
784 | release_sema: |
785 | /* | |
786 | * Try very hard to release device beacon semaphore, as otherwise | |
787 | * device/driver can be left in unusable state. | |
788 | */ | |
789 | end_jiffies = jiffies + HZ / 2; /*~500ms*/ | |
790 | ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); | |
791 | while (ret < 0) { | |
dde4673b | 792 | if (in_intr || time_is_before_eq_jiffies(end_jiffies)) { |
9be23256 JK |
793 | ret = -ETIMEDOUT; |
794 | break; | |
795 | } | |
796 | ||
797 | msleep(20); | |
798 | ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); | |
799 | } | |
800 | ||
801 | if (ret < 0) | |
802 | dev_err(zd_mac_dev(mac), "Could not release " | |
803 | "CR_BCN_FIFO_SEMAPHORE!\n"); | |
804 | if (r < 0 || ret < 0) { | |
805 | if (r >= 0) | |
806 | r = ret; | |
f762d8c3 JK |
807 | |
808 | /* We don't know if beacon was written successfully or not, | |
809 | * so clear current. */ | |
810 | zd_mac_free_cur_beacon_locked(mac); | |
811 | ||
9be23256 JK |
812 | goto out; |
813 | } | |
72e77a8a | 814 | |
f762d8c3 JK |
815 | /* Beacon has now been written successfully, update current. */ |
816 | zd_mac_free_cur_beacon_locked(mac); | |
817 | mac->beacon.cur_beacon = beacon; | |
818 | beacon = NULL; | |
819 | ||
72e77a8a LCC |
820 | /* 802.11b/g 2.4G CCK 1Mb |
821 | * 802.11a, not yet implemented, uses different values (see GPL vendor | |
822 | * driver) | |
823 | */ | |
9be23256 JK |
824 | r = zd_iowrite32_locked(&mac->chip, 0x00000400 | (full_len << 19), |
825 | CR_BCN_PLCP_CFG); | |
826 | out: | |
51272292 | 827 | kfree(ioreqs); |
f762d8c3 JK |
828 | out_nofree: |
829 | kfree_skb(beacon); | |
830 | mutex_unlock(&mac->chip.mutex); | |
831 | ||
9be23256 | 832 | return r; |
3985a465 JK |
833 | |
834 | reset_device: | |
f762d8c3 JK |
835 | zd_mac_free_cur_beacon_locked(mac); |
836 | kfree_skb(beacon); | |
837 | ||
3985a465 JK |
838 | mutex_unlock(&mac->chip.mutex); |
839 | kfree(ioreqs); | |
840 | ||
841 | /* semaphore stuck, reset device to avoid fw freeze later */ | |
842 | dev_warn(zd_mac_dev(mac), "CR_BCN_FIFO_SEMAPHORE stuck, " | |
50db7fa3 | 843 | "resetting device..."); |
3985a465 JK |
844 | usb_queue_reset_device(mac->chip.usb.intf); |
845 | ||
846 | return r; | |
72e77a8a LCC |
847 | } |
848 | ||
e85d0918 | 849 | static int fill_ctrlset(struct zd_mac *mac, |
e039fa4a | 850 | struct sk_buff *skb) |
e85d0918 DD |
851 | { |
852 | int r; | |
459c51ad DD |
853 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
854 | unsigned int frag_len = skb->len + FCS_LEN; | |
e85d0918 | 855 | unsigned int packet_length; |
2e92e6f2 | 856 | struct ieee80211_rate *txrate; |
d58ff351 | 857 | struct zd_ctrlset *cs = skb_push(skb, sizeof(struct zd_ctrlset)); |
e039fa4a | 858 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 | 859 | |
e85d0918 | 860 | ZD_ASSERT(frag_len <= 0xffff); |
e85d0918 | 861 | |
e81a7bd5 TV |
862 | /* |
863 | * Firmware computes the duration itself (for all frames except PSPoll) | |
864 | * and needs the field set to 0 at input, otherwise firmware messes up | |
865 | * duration_id and sets bits 14 and 15 on. | |
866 | */ | |
867 | if (!ieee80211_is_pspoll(hdr->frame_control)) | |
868 | hdr->duration_id = 0; | |
869 | ||
e039fa4a | 870 | txrate = ieee80211_get_tx_rate(mac->hw, info); |
2e92e6f2 JB |
871 | |
872 | cs->modulation = txrate->hw_value; | |
e6a9854b | 873 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
2e92e6f2 | 874 | cs->modulation = txrate->hw_value_short; |
e85d0918 DD |
875 | |
876 | cs->tx_length = cpu_to_le16(frag_len); | |
877 | ||
e6a9854b | 878 | cs_set_control(mac, cs, hdr, info); |
e85d0918 DD |
879 | |
880 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; | |
881 | ZD_ASSERT(packet_length <= 0xffff); | |
882 | /* ZD1211B: Computing the length difference this way, gives us | |
883 | * flexibility to compute the packet length. | |
884 | */ | |
74553aed | 885 | cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? |
e85d0918 DD |
886 | packet_length - frag_len : packet_length); |
887 | ||
888 | /* | |
889 | * CURRENT LENGTH: | |
890 | * - transmit frame length in microseconds | |
891 | * - seems to be derived from frame length | |
892 | * - see Cal_Us_Service() in zdinlinef.h | |
893 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 | |
894 | * - bTxBurstEnable is never set in the vendor driver | |
895 | * | |
896 | * SERVICE: | |
897 | * - "for PLCP configuration" | |
898 | * - always 0 except in some situations at 802.11b 11M | |
899 | * - see line 53 of zdinlinef.h | |
900 | */ | |
901 | cs->service = 0; | |
64f222cc | 902 | r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation), |
e85d0918 DD |
903 | le16_to_cpu(cs->tx_length)); |
904 | if (r < 0) | |
905 | return r; | |
906 | cs->current_length = cpu_to_le16(r); | |
459c51ad | 907 | cs->next_frame_length = 0; |
e85d0918 DD |
908 | |
909 | return 0; | |
910 | } | |
911 | ||
459c51ad DD |
912 | /** |
913 | * zd_op_tx - transmits a network frame to the device | |
914 | * | |
f3242a5b | 915 | * @hw: a &struct ieee80211_hw pointer |
459c51ad | 916 | * @control: the control structure |
f3242a5b | 917 | * @skb: socket buffer |
459c51ad DD |
918 | * |
919 | * This function transmit an IEEE 802.11 network frame to the device. The | |
920 | * control block of the skbuff will be initialized. If necessary the incoming | |
921 | * mac80211 queues will be stopped. | |
922 | */ | |
36323f81 TH |
923 | static void zd_op_tx(struct ieee80211_hw *hw, |
924 | struct ieee80211_tx_control *control, | |
925 | struct sk_buff *skb) | |
e85d0918 | 926 | { |
459c51ad | 927 | struct zd_mac *mac = zd_hw_mac(hw); |
e039fa4a | 928 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
459c51ad | 929 | int r; |
e85d0918 | 930 | |
e039fa4a | 931 | r = fill_ctrlset(mac, skb); |
459c51ad | 932 | if (r) |
640c65ea | 933 | goto fail; |
e85d0918 | 934 | |
e6a9854b | 935 | info->rate_driver_data[0] = hw; |
e039fa4a | 936 | |
459c51ad | 937 | r = zd_usb_tx(&mac->chip.usb, skb); |
e039fa4a | 938 | if (r) |
640c65ea | 939 | goto fail; |
7bb45683 | 940 | return; |
640c65ea JM |
941 | |
942 | fail: | |
943 | dev_kfree_skb(skb); | |
e85d0918 DD |
944 | } |
945 | ||
459c51ad DD |
946 | /** |
947 | * filter_ack - filters incoming packets for acknowledgements | |
f3242a5b | 948 | * @hw: a &struct ieee80211_hw pointer |
459c51ad DD |
949 | * @rx_hdr: received header |
950 | * @stats: the status for the received packet | |
741fec53 | 951 | * |
459c51ad DD |
952 | * This functions looks for ACK packets and tries to match them with the |
953 | * frames in the tx queue. If a match is found the frame will be dequeued and | |
954 | * the upper layers is informed about the successful transmission. If | |
955 | * mac80211 queues have been stopped and the number of frames still to be | |
956 | * transmitted is low the queues will be opened again. | |
e85d0918 | 957 | * |
459c51ad | 958 | * Returns 1 if the frame was an ACK, 0 if it was ignored. |
e85d0918 | 959 | */ |
459c51ad DD |
960 | static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, |
961 | struct ieee80211_rx_status *stats) | |
e85d0918 | 962 | { |
7f4013f0 | 963 | struct zd_mac *mac = zd_hw_mac(hw); |
459c51ad DD |
964 | struct sk_buff *skb; |
965 | struct sk_buff_head *q; | |
966 | unsigned long flags; | |
7f4013f0 BP |
967 | int found = 0; |
968 | int i, position = 0; | |
e85d0918 | 969 | |
85365820 | 970 | if (!ieee80211_is_ack(rx_hdr->frame_control)) |
e85d0918 | 971 | return 0; |
e85d0918 | 972 | |
7f4013f0 | 973 | q = &mac->ack_wait_queue; |
459c51ad | 974 | spin_lock_irqsave(&q->lock, flags); |
47a227db | 975 | skb_queue_walk(q, skb) { |
459c51ad DD |
976 | struct ieee80211_hdr *tx_hdr; |
977 | ||
7f4013f0 BP |
978 | position ++; |
979 | ||
980 | if (mac->ack_pending && skb_queue_is_first(q, skb)) | |
981 | continue; | |
982 | ||
459c51ad | 983 | tx_hdr = (struct ieee80211_hdr *)skb->data; |
c15975ac | 984 | if (likely(ether_addr_equal(tx_hdr->addr2, rx_hdr->addr1))) |
459c51ad | 985 | { |
7f4013f0 BP |
986 | found = 1; |
987 | break; | |
459c51ad DD |
988 | } |
989 | } | |
7f4013f0 BP |
990 | |
991 | if (found) { | |
992 | for (i=1; i<position; i++) { | |
993 | skb = __skb_dequeue(q); | |
994 | zd_mac_tx_status(hw, skb, | |
995 | mac->ack_pending ? mac->ack_signal : 0, | |
996 | NULL); | |
997 | mac->ack_pending = 0; | |
998 | } | |
999 | ||
1000 | mac->ack_pending = 1; | |
1001 | mac->ack_signal = stats->signal; | |
f773e409 JK |
1002 | |
1003 | /* Prevent pending tx-packet on AP-mode */ | |
1004 | if (mac->type == NL80211_IFTYPE_AP) { | |
1005 | skb = __skb_dequeue(q); | |
1006 | zd_mac_tx_status(hw, skb, mac->ack_signal, NULL); | |
1007 | mac->ack_pending = 0; | |
1008 | } | |
7f4013f0 BP |
1009 | } |
1010 | ||
459c51ad DD |
1011 | spin_unlock_irqrestore(&q->lock, flags); |
1012 | return 1; | |
e85d0918 DD |
1013 | } |
1014 | ||
459c51ad | 1015 | int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) |
e85d0918 | 1016 | { |
459c51ad DD |
1017 | struct zd_mac *mac = zd_hw_mac(hw); |
1018 | struct ieee80211_rx_status stats; | |
1019 | const struct rx_status *status; | |
1020 | struct sk_buff *skb; | |
1021 | int bad_frame = 0; | |
85365820 HH |
1022 | __le16 fc; |
1023 | int need_padding; | |
8318d78a JB |
1024 | int i; |
1025 | u8 rate; | |
db888aed | 1026 | |
459c51ad DD |
1027 | if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + |
1028 | FCS_LEN + sizeof(struct rx_status)) | |
1029 | return -EINVAL; | |
e85d0918 | 1030 | |
459c51ad | 1031 | memset(&stats, 0, sizeof(stats)); |
e85d0918 | 1032 | |
459c51ad DD |
1033 | /* Note about pass_failed_fcs and pass_ctrl access below: |
1034 | * mac locking intentionally omitted here, as this is the only unlocked | |
1035 | * reader and the only writer is configure_filter. Plus, if there were | |
1036 | * any races accessing these variables, it wouldn't really matter. | |
1037 | * If mac80211 ever provides a way for us to access filter flags | |
1038 | * from outside configure_filter, we could improve on this. Also, this | |
1039 | * situation may change once we implement some kind of DMA-into-skb | |
1040 | * RX path. */ | |
e85d0918 | 1041 | |
459c51ad DD |
1042 | /* Caller has to ensure that length >= sizeof(struct rx_status). */ |
1043 | status = (struct rx_status *) | |
937a049d | 1044 | (buffer + (length - sizeof(struct rx_status))); |
e85d0918 | 1045 | if (status->frame_status & ZD_RX_ERROR) { |
459c51ad DD |
1046 | if (mac->pass_failed_fcs && |
1047 | (status->frame_status & ZD_RX_CRC32_ERROR)) { | |
1048 | stats.flag |= RX_FLAG_FAILED_FCS_CRC; | |
1049 | bad_frame = 1; | |
1050 | } else { | |
1051 | return -EINVAL; | |
22d3405f | 1052 | } |
e85d0918 | 1053 | } |
22d3405f | 1054 | |
8318d78a | 1055 | stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq; |
57fbcce3 | 1056 | stats.band = NL80211_BAND_2GHZ; |
7a1d6564 | 1057 | stats.signal = zd_check_signal(hw, status->signal_strength); |
8318d78a JB |
1058 | |
1059 | rate = zd_rx_rate(buffer, status); | |
1060 | ||
1061 | /* todo: return index in the big switches in zd_rx_rate instead */ | |
1062 | for (i = 0; i < mac->band.n_bitrates; i++) | |
1063 | if (rate == mac->band.bitrates[i].hw_value) | |
1064 | stats.rate_idx = i; | |
459c51ad DD |
1065 | |
1066 | length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); | |
1067 | buffer += ZD_PLCP_HEADER_SIZE; | |
1068 | ||
1069 | /* Except for bad frames, filter each frame to see if it is an ACK, in | |
1070 | * which case our internal TX tracking is updated. Normally we then | |
1071 | * bail here as there's no need to pass ACKs on up to the stack, but | |
1072 | * there is also the case where the stack has requested us to pass | |
1073 | * control frames on up (pass_ctrl) which we must consider. */ | |
1074 | if (!bad_frame && | |
1075 | filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) | |
1076 | && !mac->pass_ctrl) | |
1077 | return 0; | |
e85d0918 | 1078 | |
42935eca | 1079 | fc = get_unaligned((__le16*)buffer); |
85365820 | 1080 | need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); |
9081728b MB |
1081 | |
1082 | skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); | |
459c51ad DD |
1083 | if (skb == NULL) |
1084 | return -ENOMEM; | |
9081728b | 1085 | if (need_padding) { |
77c2061d | 1086 | /* Make sure the payload data is 4 byte aligned. */ |
9081728b MB |
1087 | skb_reserve(skb, 2); |
1088 | } | |
1089 | ||
7f4013f0 | 1090 | /* FIXME : could we avoid this big memcpy ? */ |
59ae1d12 | 1091 | skb_put_data(skb, buffer, length); |
459c51ad | 1092 | |
f1d58c25 JB |
1093 | memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); |
1094 | ieee80211_rx_irqsafe(hw, skb); | |
e85d0918 DD |
1095 | return 0; |
1096 | } | |
1097 | ||
459c51ad | 1098 | static int zd_op_add_interface(struct ieee80211_hw *hw, |
1ed32e4f | 1099 | struct ieee80211_vif *vif) |
e85d0918 | 1100 | { |
459c51ad | 1101 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 1102 | |
05c914fe JB |
1103 | /* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */ |
1104 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) | |
459c51ad | 1105 | return -EOPNOTSUPP; |
e85d0918 | 1106 | |
1ed32e4f | 1107 | switch (vif->type) { |
05c914fe JB |
1108 | case NL80211_IFTYPE_MONITOR: |
1109 | case NL80211_IFTYPE_MESH_POINT: | |
1110 | case NL80211_IFTYPE_STATION: | |
1111 | case NL80211_IFTYPE_ADHOC: | |
ab419e9b | 1112 | case NL80211_IFTYPE_AP: |
1ed32e4f | 1113 | mac->type = vif->type; |
459c51ad DD |
1114 | break; |
1115 | default: | |
1116 | return -EOPNOTSUPP; | |
4d1feabc | 1117 | } |
e85d0918 | 1118 | |
c2fadcb3 JK |
1119 | mac->vif = vif; |
1120 | ||
1121 | return set_mac_and_bssid(mac); | |
459c51ad | 1122 | } |
e85d0918 | 1123 | |
459c51ad | 1124 | static void zd_op_remove_interface(struct ieee80211_hw *hw, |
1ed32e4f | 1125 | struct ieee80211_vif *vif) |
459c51ad DD |
1126 | { |
1127 | struct zd_mac *mac = zd_hw_mac(hw); | |
05c914fe | 1128 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
c2fadcb3 | 1129 | mac->vif = NULL; |
b91a515d | 1130 | zd_set_beacon_interval(&mac->chip, 0, 0, NL80211_IFTYPE_UNSPECIFIED); |
459c51ad | 1131 | zd_write_mac_addr(&mac->chip, NULL); |
f762d8c3 JK |
1132 | |
1133 | zd_mac_free_cur_beacon(mac); | |
459c51ad | 1134 | } |
93137943 | 1135 | |
e8975581 | 1136 | static int zd_op_config(struct ieee80211_hw *hw, u32 changed) |
459c51ad DD |
1137 | { |
1138 | struct zd_mac *mac = zd_hw_mac(hw); | |
e8975581 JB |
1139 | struct ieee80211_conf *conf = &hw->conf; |
1140 | ||
212e1a5b | 1141 | spin_lock_irq(&mac->lock); |
675a0b04 | 1142 | mac->channel = conf->chandef.chan->hw_value; |
212e1a5b JK |
1143 | spin_unlock_irq(&mac->lock); |
1144 | ||
675a0b04 | 1145 | return zd_chip_set_channel(&mac->chip, conf->chandef.chan->hw_value); |
459c51ad | 1146 | } |
db888aed | 1147 | |
4099e2f4 JK |
1148 | static void zd_beacon_done(struct zd_mac *mac) |
1149 | { | |
1150 | struct sk_buff *skb, *beacon; | |
1151 | ||
9be23256 JK |
1152 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) |
1153 | return; | |
4099e2f4 JK |
1154 | if (!mac->vif || mac->vif->type != NL80211_IFTYPE_AP) |
1155 | return; | |
1156 | ||
1157 | /* | |
1158 | * Send out buffered broad- and multicast frames. | |
1159 | */ | |
1160 | while (!ieee80211_queue_stopped(mac->hw, 0)) { | |
1161 | skb = ieee80211_get_buffered_bc(mac->hw, mac->vif); | |
1162 | if (!skb) | |
1163 | break; | |
36323f81 | 1164 | zd_op_tx(mac->hw, NULL, skb); |
4099e2f4 JK |
1165 | } |
1166 | ||
1167 | /* | |
1168 | * Fetch next beacon so that tim_count is updated. | |
1169 | */ | |
6e8912a5 | 1170 | beacon = ieee80211_beacon_get(mac->hw, mac->vif, 0); |
f762d8c3 | 1171 | if (beacon) |
dde4673b | 1172 | zd_mac_config_beacon(mac->hw, beacon, true); |
4099e2f4 | 1173 | |
9be23256 JK |
1174 | spin_lock_irq(&mac->lock); |
1175 | mac->beacon.last_update = jiffies; | |
1176 | spin_unlock_irq(&mac->lock); | |
4099e2f4 JK |
1177 | } |
1178 | ||
e83a1070 | 1179 | static void zd_process_intr(struct work_struct *work) |
72e77a8a LCC |
1180 | { |
1181 | u16 int_status; | |
8b17f75c | 1182 | unsigned long flags; |
72e77a8a LCC |
1183 | struct zd_mac *mac = container_of(work, struct zd_mac, process_intr); |
1184 | ||
8b17f75c JK |
1185 | spin_lock_irqsave(&mac->lock, flags); |
1186 | int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4)); | |
1187 | spin_unlock_irqrestore(&mac->lock, flags); | |
1188 | ||
4099e2f4 JK |
1189 | if (int_status & INT_CFG_NEXT_BCN) { |
1190 | /*dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");*/ | |
1191 | zd_beacon_done(mac); | |
1192 | } else { | |
72e77a8a | 1193 | dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n"); |
4099e2f4 | 1194 | } |
72e77a8a LCC |
1195 | |
1196 | zd_chip_enable_hwint(&mac->chip); | |
1197 | } | |
1198 | ||
1199 | ||
3ac64bee | 1200 | static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, |
22bedad3 | 1201 | struct netdev_hw_addr_list *mc_list) |
3ac64bee JB |
1202 | { |
1203 | struct zd_mac *mac = zd_hw_mac(hw); | |
1204 | struct zd_mc_hash hash; | |
22bedad3 | 1205 | struct netdev_hw_addr *ha; |
3ac64bee JB |
1206 | |
1207 | zd_mc_clear(&hash); | |
1208 | ||
22bedad3 JP |
1209 | netdev_hw_addr_list_for_each(ha, mc_list) { |
1210 | dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", ha->addr); | |
1211 | zd_mc_add_addr(&hash, ha->addr); | |
3ac64bee JB |
1212 | } |
1213 | ||
1214 | return hash.low | ((u64)hash.high << 32); | |
1215 | } | |
1216 | ||
459c51ad | 1217 | #define SUPPORTED_FIF_FLAGS \ |
df140465 | 1218 | (FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ |
2c1a1b12 | 1219 | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) |
459c51ad DD |
1220 | static void zd_op_configure_filter(struct ieee80211_hw *hw, |
1221 | unsigned int changed_flags, | |
1222 | unsigned int *new_flags, | |
3ac64bee | 1223 | u64 multicast) |
e85d0918 | 1224 | { |
3ac64bee JB |
1225 | struct zd_mc_hash hash = { |
1226 | .low = multicast, | |
1227 | .high = multicast >> 32, | |
1228 | }; | |
459c51ad DD |
1229 | struct zd_mac *mac = zd_hw_mac(hw); |
1230 | unsigned long flags; | |
a6fb071b | 1231 | int r; |
e85d0918 | 1232 | |
459c51ad DD |
1233 | /* Only deal with supported flags */ |
1234 | changed_flags &= SUPPORTED_FIF_FLAGS; | |
1235 | *new_flags &= SUPPORTED_FIF_FLAGS; | |
1236 | ||
7de3c5dc BP |
1237 | /* |
1238 | * If multicast parameter (as returned by zd_op_prepare_multicast) | |
1239 | * has changed, no bit in changed_flags is set. To handle this | |
1240 | * situation, we do not return if changed_flags is 0. If we do so, | |
1241 | * we will have some issue with IPv6 which uses multicast for link | |
1242 | * layer address resolution. | |
1243 | */ | |
df140465 | 1244 | if (*new_flags & FIF_ALLMULTI) |
459c51ad | 1245 | zd_mc_add_all(&hash); |
459c51ad DD |
1246 | |
1247 | spin_lock_irqsave(&mac->lock, flags); | |
1248 | mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); | |
1249 | mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); | |
1250 | mac->multicast_hash = hash; | |
1251 | spin_unlock_irqrestore(&mac->lock, flags); | |
3ac64bee | 1252 | |
a6fb071b | 1253 | zd_chip_set_multicast_hash(&mac->chip, &hash); |
459c51ad | 1254 | |
a6fb071b JK |
1255 | if (changed_flags & FIF_CONTROL) { |
1256 | r = set_rx_filter(mac); | |
1257 | if (r) | |
1258 | dev_err(zd_mac_dev(mac), "set_rx_filter error %d\n", r); | |
1259 | } | |
459c51ad DD |
1260 | |
1261 | /* no handling required for FIF_OTHER_BSS as we don't currently | |
1262 | * do BSSID filtering */ | |
1263 | /* FIXME: in future it would be nice to enable the probe response | |
1264 | * filter (so that the driver doesn't see them) until | |
1265 | * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd | |
1266 | * have to schedule work to enable prbresp reception, which might | |
1267 | * happen too late. For now we'll just listen and forward them all the | |
1268 | * time. */ | |
e85d0918 DD |
1269 | } |
1270 | ||
5cf6cf81 | 1271 | static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble) |
e85d0918 | 1272 | { |
459c51ad | 1273 | mutex_lock(&mac->chip.mutex); |
459c51ad DD |
1274 | zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble); |
1275 | mutex_unlock(&mac->chip.mutex); | |
e85d0918 DD |
1276 | } |
1277 | ||
471b3efd JB |
1278 | static void zd_op_bss_info_changed(struct ieee80211_hw *hw, |
1279 | struct ieee80211_vif *vif, | |
1280 | struct ieee80211_bss_conf *bss_conf, | |
7b7090b4 | 1281 | u64 changes) |
e85d0918 | 1282 | { |
459c51ad | 1283 | struct zd_mac *mac = zd_hw_mac(hw); |
2d0ddec5 | 1284 | int associated; |
459c51ad | 1285 | |
7b7090b4 | 1286 | dev_dbg_f(zd_mac_dev(mac), "changes: %llx\n", changes); |
459c51ad | 1287 | |
2d0ddec5 | 1288 | if (mac->type == NL80211_IFTYPE_MESH_POINT || |
ab419e9b JK |
1289 | mac->type == NL80211_IFTYPE_ADHOC || |
1290 | mac->type == NL80211_IFTYPE_AP) { | |
2d0ddec5 JB |
1291 | associated = true; |
1292 | if (changes & BSS_CHANGED_BEACON) { | |
6e8912a5 ST |
1293 | struct sk_buff *beacon = ieee80211_beacon_get(hw, vif, |
1294 | 0); | |
2d0ddec5 JB |
1295 | |
1296 | if (beacon) { | |
9be23256 | 1297 | zd_chip_disable_hwint(&mac->chip); |
dde4673b | 1298 | zd_mac_config_beacon(hw, beacon, false); |
9be23256 | 1299 | zd_chip_enable_hwint(&mac->chip); |
2d0ddec5 JB |
1300 | } |
1301 | } | |
1302 | ||
1303 | if (changes & BSS_CHANGED_BEACON_ENABLED) { | |
b91a515d JK |
1304 | u16 interval = 0; |
1305 | u8 period = 0; | |
2d0ddec5 | 1306 | |
b91a515d JK |
1307 | if (bss_conf->enable_beacon) { |
1308 | period = bss_conf->dtim_period; | |
1309 | interval = bss_conf->beacon_int; | |
1310 | } | |
2d0ddec5 | 1311 | |
9be23256 JK |
1312 | spin_lock_irq(&mac->lock); |
1313 | mac->beacon.period = period; | |
1314 | mac->beacon.interval = interval; | |
1315 | mac->beacon.last_update = jiffies; | |
1316 | spin_unlock_irq(&mac->lock); | |
1317 | ||
b91a515d JK |
1318 | zd_set_beacon_interval(&mac->chip, interval, period, |
1319 | mac->type); | |
2d0ddec5 JB |
1320 | } |
1321 | } else | |
1322 | associated = is_valid_ether_addr(bss_conf->bssid); | |
1323 | ||
1324 | spin_lock_irq(&mac->lock); | |
1325 | mac->associated = associated; | |
1326 | spin_unlock_irq(&mac->lock); | |
1327 | ||
1328 | /* TODO: do hardware bssid filtering */ | |
1329 | ||
471b3efd | 1330 | if (changes & BSS_CHANGED_ERP_PREAMBLE) { |
5cf6cf81 | 1331 | spin_lock_irq(&mac->lock); |
471b3efd | 1332 | mac->short_preamble = bss_conf->use_short_preamble; |
5cf6cf81 JK |
1333 | spin_unlock_irq(&mac->lock); |
1334 | ||
1335 | set_rts_cts(mac, bss_conf->use_short_preamble); | |
459c51ad | 1336 | } |
e85d0918 DD |
1337 | } |
1338 | ||
37a41b4a | 1339 | static u64 zd_op_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) |
5fe73197 AF |
1340 | { |
1341 | struct zd_mac *mac = zd_hw_mac(hw); | |
1342 | return zd_chip_get_tsf(&mac->chip); | |
1343 | } | |
1344 | ||
459c51ad | 1345 | static const struct ieee80211_ops zd_ops = { |
0a44dfc0 JB |
1346 | .add_chanctx = ieee80211_emulate_add_chanctx, |
1347 | .remove_chanctx = ieee80211_emulate_remove_chanctx, | |
1348 | .change_chanctx = ieee80211_emulate_change_chanctx, | |
1349 | .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx, | |
459c51ad | 1350 | .tx = zd_op_tx, |
a790cc3a | 1351 | .wake_tx_queue = ieee80211_handle_wake_tx_queue, |
459c51ad DD |
1352 | .start = zd_op_start, |
1353 | .stop = zd_op_stop, | |
1354 | .add_interface = zd_op_add_interface, | |
1355 | .remove_interface = zd_op_remove_interface, | |
1356 | .config = zd_op_config, | |
3ac64bee | 1357 | .prepare_multicast = zd_op_prepare_multicast, |
459c51ad | 1358 | .configure_filter = zd_op_configure_filter, |
471b3efd | 1359 | .bss_info_changed = zd_op_bss_info_changed, |
5fe73197 | 1360 | .get_tsf = zd_op_get_tsf, |
459c51ad DD |
1361 | }; |
1362 | ||
1363 | struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) | |
e85d0918 | 1364 | { |
459c51ad DD |
1365 | struct zd_mac *mac; |
1366 | struct ieee80211_hw *hw; | |
e85d0918 | 1367 | |
459c51ad DD |
1368 | hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); |
1369 | if (!hw) { | |
1370 | dev_dbg_f(&intf->dev, "out of memory\n"); | |
1371 | return NULL; | |
db888aed | 1372 | } |
459c51ad DD |
1373 | |
1374 | mac = zd_hw_mac(hw); | |
1375 | ||
1376 | memset(mac, 0, sizeof(*mac)); | |
1377 | spin_lock_init(&mac->lock); | |
1378 | mac->hw = hw; | |
1379 | ||
05c914fe | 1380 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
459c51ad DD |
1381 | |
1382 | memcpy(mac->channels, zd_channels, sizeof(zd_channels)); | |
1383 | memcpy(mac->rates, zd_rates, sizeof(zd_rates)); | |
8318d78a JB |
1384 | mac->band.n_bitrates = ARRAY_SIZE(zd_rates); |
1385 | mac->band.bitrates = mac->rates; | |
1386 | mac->band.n_channels = ARRAY_SIZE(zd_channels); | |
1387 | mac->band.channels = mac->channels; | |
1388 | ||
57fbcce3 | 1389 | hw->wiphy->bands[NL80211_BAND_2GHZ] = &mac->band; |
8318d78a | 1390 | |
30686bf7 JB |
1391 | ieee80211_hw_set(hw, MFP_CAPABLE); |
1392 | ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); | |
1393 | ieee80211_hw_set(hw, RX_INCLUDES_FCS); | |
1394 | ieee80211_hw_set(hw, SIGNAL_UNSPEC); | |
459c51ad | 1395 | |
f59ac048 LR |
1396 | hw->wiphy->interface_modes = |
1397 | BIT(NL80211_IFTYPE_MESH_POINT) | | |
1398 | BIT(NL80211_IFTYPE_STATION) | | |
ab419e9b JK |
1399 | BIT(NL80211_IFTYPE_ADHOC) | |
1400 | BIT(NL80211_IFTYPE_AP); | |
f59ac048 | 1401 | |
ae44b502 AZ |
1402 | wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); |
1403 | ||
566bfe5a | 1404 | hw->max_signal = 100; |
459c51ad DD |
1405 | hw->queues = 1; |
1406 | hw->extra_tx_headroom = sizeof(struct zd_ctrlset); | |
1407 | ||
7f4013f0 BP |
1408 | /* |
1409 | * Tell mac80211 that we support multi rate retries | |
1410 | */ | |
1411 | hw->max_rates = IEEE80211_TX_MAX_RATES; | |
1412 | hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ | |
1413 | ||
459c51ad | 1414 | skb_queue_head_init(&mac->ack_wait_queue); |
7f4013f0 | 1415 | mac->ack_pending = 0; |
459c51ad | 1416 | |
459c51ad DD |
1417 | zd_chip_init(&mac->chip, hw, intf); |
1418 | housekeeping_init(mac); | |
9be23256 | 1419 | beacon_init(mac); |
72e77a8a | 1420 | INIT_WORK(&mac->process_intr, zd_process_intr); |
459c51ad DD |
1421 | |
1422 | SET_IEEE80211_DEV(hw, &intf->dev); | |
1423 | return hw; | |
e85d0918 DD |
1424 | } |
1425 | ||
9be23256 JK |
1426 | #define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ) |
1427 | ||
1428 | static void beacon_watchdog_handler(struct work_struct *work) | |
1429 | { | |
1430 | struct zd_mac *mac = | |
1431 | container_of(work, struct zd_mac, beacon.watchdog_work.work); | |
1432 | struct sk_buff *beacon; | |
1433 | unsigned long timeout; | |
1434 | int interval, period; | |
1435 | ||
1436 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) | |
1437 | goto rearm; | |
1438 | if (mac->type != NL80211_IFTYPE_AP || !mac->vif) | |
1439 | goto rearm; | |
1440 | ||
1441 | spin_lock_irq(&mac->lock); | |
1442 | interval = mac->beacon.interval; | |
1443 | period = mac->beacon.period; | |
55f7782e JK |
1444 | timeout = mac->beacon.last_update + |
1445 | msecs_to_jiffies(interval * 1024 / 1000) * 3; | |
9be23256 JK |
1446 | spin_unlock_irq(&mac->lock); |
1447 | ||
1448 | if (interval > 0 && time_is_before_jiffies(timeout)) { | |
1449 | dev_dbg_f(zd_mac_dev(mac), "beacon interrupt stalled, " | |
1450 | "restarting. " | |
1451 | "(interval: %d, dtim: %d)\n", | |
1452 | interval, period); | |
1453 | ||
1454 | zd_chip_disable_hwint(&mac->chip); | |
1455 | ||
6e8912a5 | 1456 | beacon = ieee80211_beacon_get(mac->hw, mac->vif, 0); |
9be23256 | 1457 | if (beacon) { |
f762d8c3 JK |
1458 | zd_mac_free_cur_beacon(mac); |
1459 | ||
dde4673b | 1460 | zd_mac_config_beacon(mac->hw, beacon, false); |
9be23256 JK |
1461 | } |
1462 | ||
1463 | zd_set_beacon_interval(&mac->chip, interval, period, mac->type); | |
1464 | ||
1465 | zd_chip_enable_hwint(&mac->chip); | |
1466 | ||
1467 | spin_lock_irq(&mac->lock); | |
1468 | mac->beacon.last_update = jiffies; | |
1469 | spin_unlock_irq(&mac->lock); | |
1470 | } | |
1471 | ||
1472 | rearm: | |
1473 | queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, | |
1474 | BEACON_WATCHDOG_DELAY); | |
1475 | } | |
1476 | ||
1477 | static void beacon_init(struct zd_mac *mac) | |
1478 | { | |
1479 | INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler); | |
1480 | } | |
1481 | ||
1482 | static void beacon_enable(struct zd_mac *mac) | |
1483 | { | |
1484 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1485 | ||
1486 | mac->beacon.last_update = jiffies; | |
1487 | queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, | |
1488 | BEACON_WATCHDOG_DELAY); | |
1489 | } | |
1490 | ||
1491 | static void beacon_disable(struct zd_mac *mac) | |
1492 | { | |
1493 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1494 | cancel_delayed_work_sync(&mac->beacon.watchdog_work); | |
f762d8c3 JK |
1495 | |
1496 | zd_mac_free_cur_beacon(mac); | |
9be23256 JK |
1497 | } |
1498 | ||
583afd1e UK |
1499 | #define LINK_LED_WORK_DELAY HZ |
1500 | ||
c4028958 | 1501 | static void link_led_handler(struct work_struct *work) |
583afd1e | 1502 | { |
c4028958 DH |
1503 | struct zd_mac *mac = |
1504 | container_of(work, struct zd_mac, housekeeping.link_led_work.work); | |
583afd1e | 1505 | struct zd_chip *chip = &mac->chip; |
583afd1e UK |
1506 | int is_associated; |
1507 | int r; | |
1508 | ||
a0fd751f JK |
1509 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) |
1510 | goto requeue; | |
1511 | ||
583afd1e | 1512 | spin_lock_irq(&mac->lock); |
459c51ad | 1513 | is_associated = mac->associated; |
583afd1e UK |
1514 | spin_unlock_irq(&mac->lock); |
1515 | ||
1516 | r = zd_chip_control_leds(chip, | |
14b46c8a | 1517 | is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING); |
583afd1e | 1518 | if (r) |
459c51ad | 1519 | dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); |
583afd1e | 1520 | |
a0fd751f | 1521 | requeue: |
583afd1e UK |
1522 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, |
1523 | LINK_LED_WORK_DELAY); | |
1524 | } | |
1525 | ||
1526 | static void housekeeping_init(struct zd_mac *mac) | |
1527 | { | |
c4028958 | 1528 | INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); |
583afd1e UK |
1529 | } |
1530 | ||
1531 | static void housekeeping_enable(struct zd_mac *mac) | |
1532 | { | |
1533 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1534 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1535 | 0); | |
1536 | } | |
1537 | ||
1538 | static void housekeeping_disable(struct zd_mac *mac) | |
1539 | { | |
1540 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
afe2c511 | 1541 | cancel_delayed_work_sync(&mac->housekeeping.link_led_work); |
14b46c8a | 1542 | zd_chip_control_leds(&mac->chip, ZD_LED_OFF); |
583afd1e | 1543 | } |