Commit | Line | Data |
---|---|---|
f078f209 | 1 | /* |
5b68138e | 2 | * Copyright (c) 2008-2011 Atheros Communications Inc. |
f078f209 LR |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
b7f080cf | 17 | #include <linux/dma-mapping.h> |
394cf0a1 | 18 | #include "ath9k.h" |
b622a720 | 19 | #include "ar9003_mac.h" |
f078f209 | 20 | |
b5c80475 FF |
21 | #define SKB_CB_ATHBUF(__skb) (*((struct ath_buf **)__skb->cb)) |
22 | ||
102885a5 VT |
23 | static inline bool ath_is_alt_ant_ratio_better(int alt_ratio, int maxdelta, |
24 | int mindelta, int main_rssi_avg, | |
25 | int alt_rssi_avg, int pkt_count) | |
26 | { | |
27 | return (((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) && | |
28 | (alt_rssi_avg > main_rssi_avg + maxdelta)) || | |
29 | (alt_rssi_avg > main_rssi_avg + mindelta)) && (pkt_count > 50); | |
30 | } | |
31 | ||
b85c5734 MSS |
32 | static inline bool ath_ant_div_comb_alt_check(u8 div_group, int alt_ratio, |
33 | int curr_main_set, int curr_alt_set, | |
34 | int alt_rssi_avg, int main_rssi_avg) | |
35 | { | |
36 | bool result = false; | |
37 | switch (div_group) { | |
38 | case 0: | |
39 | if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) | |
40 | result = true; | |
41 | break; | |
42 | case 1: | |
66ce235a | 43 | case 2: |
b85c5734 MSS |
44 | if ((((curr_main_set == ATH_ANT_DIV_COMB_LNA2) && |
45 | (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) && | |
46 | (alt_rssi_avg >= (main_rssi_avg - 5))) || | |
47 | ((curr_main_set == ATH_ANT_DIV_COMB_LNA1) && | |
48 | (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) && | |
49 | (alt_rssi_avg >= (main_rssi_avg - 2)))) && | |
50 | (alt_rssi_avg >= 4)) | |
51 | result = true; | |
52 | else | |
53 | result = false; | |
54 | break; | |
55 | } | |
56 | ||
57 | return result; | |
58 | } | |
59 | ||
ededf1f8 VT |
60 | static inline bool ath9k_check_auto_sleep(struct ath_softc *sc) |
61 | { | |
62 | return sc->ps_enabled && | |
63 | (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP); | |
64 | } | |
65 | ||
f078f209 LR |
66 | /* |
67 | * Setup and link descriptors. | |
68 | * | |
69 | * 11N: we can no longer afford to self link the last descriptor. | |
70 | * MAC acknowledges BA status as long as it copies frames to host | |
71 | * buffer (or rx fifo). This can incorrectly acknowledge packets | |
72 | * to a sender if last desc is self-linked. | |
f078f209 | 73 | */ |
f078f209 LR |
74 | static void ath_rx_buf_link(struct ath_softc *sc, struct ath_buf *bf) |
75 | { | |
cbe61d8a | 76 | struct ath_hw *ah = sc->sc_ah; |
cc861f74 | 77 | struct ath_common *common = ath9k_hw_common(ah); |
f078f209 LR |
78 | struct ath_desc *ds; |
79 | struct sk_buff *skb; | |
80 | ||
81 | ATH_RXBUF_RESET(bf); | |
82 | ||
83 | ds = bf->bf_desc; | |
be0418ad | 84 | ds->ds_link = 0; /* link to null */ |
f078f209 LR |
85 | ds->ds_data = bf->bf_buf_addr; |
86 | ||
be0418ad | 87 | /* virtual addr of the beginning of the buffer. */ |
f078f209 | 88 | skb = bf->bf_mpdu; |
9680e8a3 | 89 | BUG_ON(skb == NULL); |
f078f209 LR |
90 | ds->ds_vdata = skb->data; |
91 | ||
cc861f74 LR |
92 | /* |
93 | * setup rx descriptors. The rx_bufsize here tells the hardware | |
b4b6cda2 | 94 | * how much data it can DMA to us and that we are prepared |
cc861f74 LR |
95 | * to process |
96 | */ | |
b77f483f | 97 | ath9k_hw_setuprxdesc(ah, ds, |
cc861f74 | 98 | common->rx_bufsize, |
f078f209 LR |
99 | 0); |
100 | ||
b77f483f | 101 | if (sc->rx.rxlink == NULL) |
f078f209 LR |
102 | ath9k_hw_putrxbuf(ah, bf->bf_daddr); |
103 | else | |
b77f483f | 104 | *sc->rx.rxlink = bf->bf_daddr; |
f078f209 | 105 | |
b77f483f | 106 | sc->rx.rxlink = &ds->ds_link; |
f078f209 LR |
107 | } |
108 | ||
ff37e337 S |
109 | static void ath_setdefantenna(struct ath_softc *sc, u32 antenna) |
110 | { | |
111 | /* XXX block beacon interrupts */ | |
112 | ath9k_hw_setantenna(sc->sc_ah, antenna); | |
b77f483f S |
113 | sc->rx.defant = antenna; |
114 | sc->rx.rxotherant = 0; | |
ff37e337 S |
115 | } |
116 | ||
f078f209 LR |
117 | static void ath_opmode_init(struct ath_softc *sc) |
118 | { | |
cbe61d8a | 119 | struct ath_hw *ah = sc->sc_ah; |
1510718d LR |
120 | struct ath_common *common = ath9k_hw_common(ah); |
121 | ||
f078f209 LR |
122 | u32 rfilt, mfilt[2]; |
123 | ||
124 | /* configure rx filter */ | |
125 | rfilt = ath_calcrxfilter(sc); | |
126 | ath9k_hw_setrxfilter(ah, rfilt); | |
127 | ||
128 | /* configure bssid mask */ | |
364734fa | 129 | ath_hw_setbssidmask(common); |
f078f209 LR |
130 | |
131 | /* configure operational mode */ | |
132 | ath9k_hw_setopmode(ah); | |
133 | ||
f078f209 LR |
134 | /* calculate and install multicast filter */ |
135 | mfilt[0] = mfilt[1] = ~0; | |
f078f209 | 136 | ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]); |
f078f209 LR |
137 | } |
138 | ||
b5c80475 FF |
139 | static bool ath_rx_edma_buf_link(struct ath_softc *sc, |
140 | enum ath9k_rx_qtype qtype) | |
f078f209 | 141 | { |
b5c80475 FF |
142 | struct ath_hw *ah = sc->sc_ah; |
143 | struct ath_rx_edma *rx_edma; | |
f078f209 LR |
144 | struct sk_buff *skb; |
145 | struct ath_buf *bf; | |
f078f209 | 146 | |
b5c80475 FF |
147 | rx_edma = &sc->rx.rx_edma[qtype]; |
148 | if (skb_queue_len(&rx_edma->rx_fifo) >= rx_edma->rx_fifo_hwsize) | |
149 | return false; | |
f078f209 | 150 | |
b5c80475 FF |
151 | bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list); |
152 | list_del_init(&bf->list); | |
f078f209 | 153 | |
b5c80475 FF |
154 | skb = bf->bf_mpdu; |
155 | ||
156 | ATH_RXBUF_RESET(bf); | |
157 | memset(skb->data, 0, ah->caps.rx_status_len); | |
158 | dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, | |
159 | ah->caps.rx_status_len, DMA_TO_DEVICE); | |
f078f209 | 160 | |
b5c80475 FF |
161 | SKB_CB_ATHBUF(skb) = bf; |
162 | ath9k_hw_addrxbuf_edma(ah, bf->bf_buf_addr, qtype); | |
163 | skb_queue_tail(&rx_edma->rx_fifo, skb); | |
f078f209 | 164 | |
b5c80475 FF |
165 | return true; |
166 | } | |
167 | ||
168 | static void ath_rx_addbuffer_edma(struct ath_softc *sc, | |
169 | enum ath9k_rx_qtype qtype, int size) | |
170 | { | |
b5c80475 FF |
171 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
172 | u32 nbuf = 0; | |
173 | ||
b5c80475 | 174 | if (list_empty(&sc->rx.rxbuf)) { |
226afe68 | 175 | ath_dbg(common, ATH_DBG_QUEUE, "No free rx buf available\n"); |
b5c80475 | 176 | return; |
797fe5cb | 177 | } |
f078f209 | 178 | |
b5c80475 FF |
179 | while (!list_empty(&sc->rx.rxbuf)) { |
180 | nbuf++; | |
181 | ||
182 | if (!ath_rx_edma_buf_link(sc, qtype)) | |
183 | break; | |
184 | ||
185 | if (nbuf >= size) | |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
190 | static void ath_rx_remove_buffer(struct ath_softc *sc, | |
191 | enum ath9k_rx_qtype qtype) | |
192 | { | |
193 | struct ath_buf *bf; | |
194 | struct ath_rx_edma *rx_edma; | |
195 | struct sk_buff *skb; | |
196 | ||
197 | rx_edma = &sc->rx.rx_edma[qtype]; | |
198 | ||
199 | while ((skb = skb_dequeue(&rx_edma->rx_fifo)) != NULL) { | |
200 | bf = SKB_CB_ATHBUF(skb); | |
201 | BUG_ON(!bf); | |
202 | list_add_tail(&bf->list, &sc->rx.rxbuf); | |
203 | } | |
204 | } | |
205 | ||
206 | static void ath_rx_edma_cleanup(struct ath_softc *sc) | |
207 | { | |
208 | struct ath_buf *bf; | |
209 | ||
210 | ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP); | |
211 | ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP); | |
212 | ||
797fe5cb | 213 | list_for_each_entry(bf, &sc->rx.rxbuf, list) { |
b5c80475 FF |
214 | if (bf->bf_mpdu) |
215 | dev_kfree_skb_any(bf->bf_mpdu); | |
216 | } | |
217 | ||
218 | INIT_LIST_HEAD(&sc->rx.rxbuf); | |
219 | ||
220 | kfree(sc->rx.rx_bufptr); | |
221 | sc->rx.rx_bufptr = NULL; | |
222 | } | |
223 | ||
224 | static void ath_rx_edma_init_queue(struct ath_rx_edma *rx_edma, int size) | |
225 | { | |
226 | skb_queue_head_init(&rx_edma->rx_fifo); | |
227 | skb_queue_head_init(&rx_edma->rx_buffers); | |
228 | rx_edma->rx_fifo_hwsize = size; | |
229 | } | |
230 | ||
231 | static int ath_rx_edma_init(struct ath_softc *sc, int nbufs) | |
232 | { | |
233 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
234 | struct ath_hw *ah = sc->sc_ah; | |
235 | struct sk_buff *skb; | |
236 | struct ath_buf *bf; | |
237 | int error = 0, i; | |
238 | u32 size; | |
239 | ||
b5c80475 FF |
240 | ath9k_hw_set_rx_bufsize(ah, common->rx_bufsize - |
241 | ah->caps.rx_status_len); | |
242 | ||
243 | ath_rx_edma_init_queue(&sc->rx.rx_edma[ATH9K_RX_QUEUE_LP], | |
244 | ah->caps.rx_lp_qdepth); | |
245 | ath_rx_edma_init_queue(&sc->rx.rx_edma[ATH9K_RX_QUEUE_HP], | |
246 | ah->caps.rx_hp_qdepth); | |
247 | ||
248 | size = sizeof(struct ath_buf) * nbufs; | |
249 | bf = kzalloc(size, GFP_KERNEL); | |
250 | if (!bf) | |
251 | return -ENOMEM; | |
252 | ||
253 | INIT_LIST_HEAD(&sc->rx.rxbuf); | |
254 | sc->rx.rx_bufptr = bf; | |
255 | ||
256 | for (i = 0; i < nbufs; i++, bf++) { | |
cc861f74 | 257 | skb = ath_rxbuf_alloc(common, common->rx_bufsize, GFP_KERNEL); |
b5c80475 | 258 | if (!skb) { |
797fe5cb | 259 | error = -ENOMEM; |
b5c80475 | 260 | goto rx_init_fail; |
f078f209 | 261 | } |
f078f209 | 262 | |
b5c80475 | 263 | memset(skb->data, 0, common->rx_bufsize); |
797fe5cb | 264 | bf->bf_mpdu = skb; |
b5c80475 | 265 | |
797fe5cb | 266 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
cc861f74 | 267 | common->rx_bufsize, |
b5c80475 | 268 | DMA_BIDIRECTIONAL); |
797fe5cb | 269 | if (unlikely(dma_mapping_error(sc->dev, |
b5c80475 FF |
270 | bf->bf_buf_addr))) { |
271 | dev_kfree_skb_any(skb); | |
272 | bf->bf_mpdu = NULL; | |
6cf9e995 | 273 | bf->bf_buf_addr = 0; |
3800276a | 274 | ath_err(common, |
b5c80475 FF |
275 | "dma_mapping_error() on RX init\n"); |
276 | error = -ENOMEM; | |
277 | goto rx_init_fail; | |
278 | } | |
279 | ||
280 | list_add_tail(&bf->list, &sc->rx.rxbuf); | |
281 | } | |
282 | ||
283 | return 0; | |
284 | ||
285 | rx_init_fail: | |
286 | ath_rx_edma_cleanup(sc); | |
287 | return error; | |
288 | } | |
289 | ||
290 | static void ath_edma_start_recv(struct ath_softc *sc) | |
291 | { | |
292 | spin_lock_bh(&sc->rx.rxbuflock); | |
293 | ||
294 | ath9k_hw_rxena(sc->sc_ah); | |
295 | ||
296 | ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_HP, | |
297 | sc->rx.rx_edma[ATH9K_RX_QUEUE_HP].rx_fifo_hwsize); | |
298 | ||
299 | ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_LP, | |
300 | sc->rx.rx_edma[ATH9K_RX_QUEUE_LP].rx_fifo_hwsize); | |
301 | ||
b5c80475 FF |
302 | ath_opmode_init(sc); |
303 | ||
48a6a468 | 304 | ath9k_hw_startpcureceive(sc->sc_ah, (sc->sc_flags & SC_OP_OFFCHANNEL)); |
7583c550 LR |
305 | |
306 | spin_unlock_bh(&sc->rx.rxbuflock); | |
b5c80475 FF |
307 | } |
308 | ||
309 | static void ath_edma_stop_recv(struct ath_softc *sc) | |
310 | { | |
b5c80475 FF |
311 | ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP); |
312 | ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP); | |
b5c80475 FF |
313 | } |
314 | ||
315 | int ath_rx_init(struct ath_softc *sc, int nbufs) | |
316 | { | |
317 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
318 | struct sk_buff *skb; | |
319 | struct ath_buf *bf; | |
320 | int error = 0; | |
321 | ||
4bdd1e97 | 322 | spin_lock_init(&sc->sc_pcu_lock); |
b5c80475 FF |
323 | sc->sc_flags &= ~SC_OP_RXFLUSH; |
324 | spin_lock_init(&sc->rx.rxbuflock); | |
325 | ||
0d95521e FF |
326 | common->rx_bufsize = IEEE80211_MAX_MPDU_LEN / 2 + |
327 | sc->sc_ah->caps.rx_status_len; | |
328 | ||
b5c80475 FF |
329 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
330 | return ath_rx_edma_init(sc, nbufs); | |
331 | } else { | |
226afe68 JP |
332 | ath_dbg(common, ATH_DBG_CONFIG, "cachelsz %u rxbufsize %u\n", |
333 | common->cachelsz, common->rx_bufsize); | |
b5c80475 FF |
334 | |
335 | /* Initialize rx descriptors */ | |
336 | ||
337 | error = ath_descdma_setup(sc, &sc->rx.rxdma, &sc->rx.rxbuf, | |
4adfcded | 338 | "rx", nbufs, 1, 0); |
b5c80475 | 339 | if (error != 0) { |
3800276a JP |
340 | ath_err(common, |
341 | "failed to allocate rx descriptors: %d\n", | |
342 | error); | |
797fe5cb S |
343 | goto err; |
344 | } | |
b5c80475 FF |
345 | |
346 | list_for_each_entry(bf, &sc->rx.rxbuf, list) { | |
347 | skb = ath_rxbuf_alloc(common, common->rx_bufsize, | |
348 | GFP_KERNEL); | |
349 | if (skb == NULL) { | |
350 | error = -ENOMEM; | |
351 | goto err; | |
352 | } | |
353 | ||
354 | bf->bf_mpdu = skb; | |
355 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, | |
356 | common->rx_bufsize, | |
357 | DMA_FROM_DEVICE); | |
358 | if (unlikely(dma_mapping_error(sc->dev, | |
359 | bf->bf_buf_addr))) { | |
360 | dev_kfree_skb_any(skb); | |
361 | bf->bf_mpdu = NULL; | |
6cf9e995 | 362 | bf->bf_buf_addr = 0; |
3800276a JP |
363 | ath_err(common, |
364 | "dma_mapping_error() on RX init\n"); | |
b5c80475 FF |
365 | error = -ENOMEM; |
366 | goto err; | |
367 | } | |
b5c80475 FF |
368 | } |
369 | sc->rx.rxlink = NULL; | |
797fe5cb | 370 | } |
f078f209 | 371 | |
797fe5cb | 372 | err: |
f078f209 LR |
373 | if (error) |
374 | ath_rx_cleanup(sc); | |
375 | ||
376 | return error; | |
377 | } | |
378 | ||
f078f209 LR |
379 | void ath_rx_cleanup(struct ath_softc *sc) |
380 | { | |
cc861f74 LR |
381 | struct ath_hw *ah = sc->sc_ah; |
382 | struct ath_common *common = ath9k_hw_common(ah); | |
f078f209 LR |
383 | struct sk_buff *skb; |
384 | struct ath_buf *bf; | |
385 | ||
b5c80475 FF |
386 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
387 | ath_rx_edma_cleanup(sc); | |
388 | return; | |
389 | } else { | |
390 | list_for_each_entry(bf, &sc->rx.rxbuf, list) { | |
391 | skb = bf->bf_mpdu; | |
392 | if (skb) { | |
393 | dma_unmap_single(sc->dev, bf->bf_buf_addr, | |
394 | common->rx_bufsize, | |
395 | DMA_FROM_DEVICE); | |
396 | dev_kfree_skb(skb); | |
6cf9e995 BG |
397 | bf->bf_buf_addr = 0; |
398 | bf->bf_mpdu = NULL; | |
b5c80475 | 399 | } |
051b9191 | 400 | } |
f078f209 | 401 | |
b5c80475 FF |
402 | if (sc->rx.rxdma.dd_desc_len != 0) |
403 | ath_descdma_cleanup(sc, &sc->rx.rxdma, &sc->rx.rxbuf); | |
404 | } | |
f078f209 LR |
405 | } |
406 | ||
407 | /* | |
408 | * Calculate the receive filter according to the | |
409 | * operating mode and state: | |
410 | * | |
411 | * o always accept unicast, broadcast, and multicast traffic | |
412 | * o maintain current state of phy error reception (the hal | |
413 | * may enable phy error frames for noise immunity work) | |
414 | * o probe request frames are accepted only when operating in | |
415 | * hostap, adhoc, or monitor modes | |
416 | * o enable promiscuous mode according to the interface state | |
417 | * o accept beacons: | |
418 | * - when operating in adhoc mode so the 802.11 layer creates | |
419 | * node table entries for peers, | |
420 | * - when operating in station mode for collecting rssi data when | |
421 | * the station is otherwise quiet, or | |
422 | * - when operating as a repeater so we see repeater-sta beacons | |
423 | * - when scanning | |
424 | */ | |
425 | ||
426 | u32 ath_calcrxfilter(struct ath_softc *sc) | |
427 | { | |
428 | #define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR) | |
7dcfdcd9 | 429 | |
f078f209 LR |
430 | u32 rfilt; |
431 | ||
432 | rfilt = (ath9k_hw_getrxfilter(sc->sc_ah) & RX_FILTER_PRESERVE) | |
433 | | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST | |
434 | | ATH9K_RX_FILTER_MCAST; | |
435 | ||
9c1d8e4a | 436 | if (sc->rx.rxfilter & FIF_PROBE_REQ) |
f078f209 LR |
437 | rfilt |= ATH9K_RX_FILTER_PROBEREQ; |
438 | ||
217ba9da JM |
439 | /* |
440 | * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station | |
441 | * mode interface or when in monitor mode. AP mode does not need this | |
442 | * since it receives all in-BSS frames anyway. | |
443 | */ | |
2e286947 | 444 | if (sc->sc_ah->is_monitoring) |
f078f209 | 445 | rfilt |= ATH9K_RX_FILTER_PROM; |
f078f209 | 446 | |
d42c6b71 S |
447 | if (sc->rx.rxfilter & FIF_CONTROL) |
448 | rfilt |= ATH9K_RX_FILTER_CONTROL; | |
449 | ||
dbaaa147 | 450 | if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) && |
cfda6695 | 451 | (sc->nvifs <= 1) && |
dbaaa147 VT |
452 | !(sc->rx.rxfilter & FIF_BCN_PRBRESP_PROMISC)) |
453 | rfilt |= ATH9K_RX_FILTER_MYBEACON; | |
454 | else | |
f078f209 LR |
455 | rfilt |= ATH9K_RX_FILTER_BEACON; |
456 | ||
264bbec8 | 457 | if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) || |
66afad01 | 458 | (sc->rx.rxfilter & FIF_PSPOLL)) |
dbaaa147 | 459 | rfilt |= ATH9K_RX_FILTER_PSPOLL; |
be0418ad | 460 | |
7ea310be S |
461 | if (conf_is_ht(&sc->hw->conf)) |
462 | rfilt |= ATH9K_RX_FILTER_COMP_BAR; | |
463 | ||
7545daf4 | 464 | if (sc->nvifs > 1 || (sc->rx.rxfilter & FIF_OTHER_BSS)) { |
5eb6ba83 JC |
465 | /* The following may also be needed for other older chips */ |
466 | if (sc->sc_ah->hw_version.macVersion == AR_SREV_VERSION_9160) | |
467 | rfilt |= ATH9K_RX_FILTER_PROM; | |
b93bce2a JM |
468 | rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL; |
469 | } | |
470 | ||
f078f209 | 471 | return rfilt; |
7dcfdcd9 | 472 | |
f078f209 LR |
473 | #undef RX_FILTER_PRESERVE |
474 | } | |
475 | ||
f078f209 LR |
476 | int ath_startrecv(struct ath_softc *sc) |
477 | { | |
cbe61d8a | 478 | struct ath_hw *ah = sc->sc_ah; |
f078f209 LR |
479 | struct ath_buf *bf, *tbf; |
480 | ||
b5c80475 FF |
481 | if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
482 | ath_edma_start_recv(sc); | |
483 | return 0; | |
484 | } | |
485 | ||
b77f483f S |
486 | spin_lock_bh(&sc->rx.rxbuflock); |
487 | if (list_empty(&sc->rx.rxbuf)) | |
f078f209 LR |
488 | goto start_recv; |
489 | ||
b77f483f S |
490 | sc->rx.rxlink = NULL; |
491 | list_for_each_entry_safe(bf, tbf, &sc->rx.rxbuf, list) { | |
f078f209 LR |
492 | ath_rx_buf_link(sc, bf); |
493 | } | |
494 | ||
495 | /* We could have deleted elements so the list may be empty now */ | |
b77f483f | 496 | if (list_empty(&sc->rx.rxbuf)) |
f078f209 LR |
497 | goto start_recv; |
498 | ||
b77f483f | 499 | bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list); |
f078f209 | 500 | ath9k_hw_putrxbuf(ah, bf->bf_daddr); |
be0418ad | 501 | ath9k_hw_rxena(ah); |
f078f209 LR |
502 | |
503 | start_recv: | |
be0418ad | 504 | ath_opmode_init(sc); |
48a6a468 | 505 | ath9k_hw_startpcureceive(ah, (sc->sc_flags & SC_OP_OFFCHANNEL)); |
be0418ad | 506 | |
7583c550 LR |
507 | spin_unlock_bh(&sc->rx.rxbuflock); |
508 | ||
f078f209 LR |
509 | return 0; |
510 | } | |
511 | ||
f078f209 LR |
512 | bool ath_stoprecv(struct ath_softc *sc) |
513 | { | |
cbe61d8a | 514 | struct ath_hw *ah = sc->sc_ah; |
5882da02 | 515 | bool stopped, reset = false; |
f078f209 | 516 | |
1e450285 | 517 | spin_lock_bh(&sc->rx.rxbuflock); |
d47844a0 | 518 | ath9k_hw_abortpcurecv(ah); |
be0418ad | 519 | ath9k_hw_setrxfilter(ah, 0); |
5882da02 | 520 | stopped = ath9k_hw_stopdmarecv(ah, &reset); |
b5c80475 FF |
521 | |
522 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) | |
523 | ath_edma_stop_recv(sc); | |
524 | else | |
525 | sc->rx.rxlink = NULL; | |
1e450285 | 526 | spin_unlock_bh(&sc->rx.rxbuflock); |
be0418ad | 527 | |
d584747b RM |
528 | if (!(ah->ah_flags & AH_UNPLUGGED) && |
529 | unlikely(!stopped)) { | |
d7fd1b50 BG |
530 | ath_err(ath9k_hw_common(sc->sc_ah), |
531 | "Could not stop RX, we could be " | |
532 | "confusing the DMA engine when we start RX up\n"); | |
533 | ATH_DBG_WARN_ON_ONCE(!stopped); | |
534 | } | |
2232d31b | 535 | return stopped && !reset; |
f078f209 LR |
536 | } |
537 | ||
f078f209 LR |
538 | void ath_flushrecv(struct ath_softc *sc) |
539 | { | |
98deeea0 | 540 | sc->sc_flags |= SC_OP_RXFLUSH; |
b5c80475 FF |
541 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) |
542 | ath_rx_tasklet(sc, 1, true); | |
543 | ath_rx_tasklet(sc, 1, false); | |
98deeea0 | 544 | sc->sc_flags &= ~SC_OP_RXFLUSH; |
f078f209 LR |
545 | } |
546 | ||
cc65965c JM |
547 | static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb) |
548 | { | |
549 | /* Check whether the Beacon frame has DTIM indicating buffered bc/mc */ | |
550 | struct ieee80211_mgmt *mgmt; | |
551 | u8 *pos, *end, id, elen; | |
552 | struct ieee80211_tim_ie *tim; | |
553 | ||
554 | mgmt = (struct ieee80211_mgmt *)skb->data; | |
555 | pos = mgmt->u.beacon.variable; | |
556 | end = skb->data + skb->len; | |
557 | ||
558 | while (pos + 2 < end) { | |
559 | id = *pos++; | |
560 | elen = *pos++; | |
561 | if (pos + elen > end) | |
562 | break; | |
563 | ||
564 | if (id == WLAN_EID_TIM) { | |
565 | if (elen < sizeof(*tim)) | |
566 | break; | |
567 | tim = (struct ieee80211_tim_ie *) pos; | |
568 | if (tim->dtim_count != 0) | |
569 | break; | |
570 | return tim->bitmap_ctrl & 0x01; | |
571 | } | |
572 | ||
573 | pos += elen; | |
574 | } | |
575 | ||
576 | return false; | |
577 | } | |
578 | ||
cc65965c JM |
579 | static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb) |
580 | { | |
581 | struct ieee80211_mgmt *mgmt; | |
1510718d | 582 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
cc65965c JM |
583 | |
584 | if (skb->len < 24 + 8 + 2 + 2) | |
585 | return; | |
586 | ||
587 | mgmt = (struct ieee80211_mgmt *)skb->data; | |
4801416c BG |
588 | if (memcmp(common->curbssid, mgmt->bssid, ETH_ALEN) != 0) { |
589 | /* TODO: This doesn't work well if you have stations | |
590 | * associated to two different APs because curbssid | |
591 | * is just the last AP that any of the stations associated | |
592 | * with. | |
593 | */ | |
cc65965c | 594 | return; /* not from our current AP */ |
4801416c | 595 | } |
cc65965c | 596 | |
1b04b930 | 597 | sc->ps_flags &= ~PS_WAIT_FOR_BEACON; |
293dc5df | 598 | |
1b04b930 S |
599 | if (sc->ps_flags & PS_BEACON_SYNC) { |
600 | sc->ps_flags &= ~PS_BEACON_SYNC; | |
226afe68 JP |
601 | ath_dbg(common, ATH_DBG_PS, |
602 | "Reconfigure Beacon timers based on timestamp from the AP\n"); | |
99e4d43a | 603 | ath_set_beacon(sc); |
ccdfeab6 JM |
604 | } |
605 | ||
cc65965c JM |
606 | if (ath_beacon_dtim_pending_cab(skb)) { |
607 | /* | |
608 | * Remain awake waiting for buffered broadcast/multicast | |
58f5fffd GJ |
609 | * frames. If the last broadcast/multicast frame is not |
610 | * received properly, the next beacon frame will work as | |
611 | * a backup trigger for returning into NETWORK SLEEP state, | |
612 | * so we are waiting for it as well. | |
cc65965c | 613 | */ |
226afe68 JP |
614 | ath_dbg(common, ATH_DBG_PS, |
615 | "Received DTIM beacon indicating buffered broadcast/multicast frame(s)\n"); | |
1b04b930 | 616 | sc->ps_flags |= PS_WAIT_FOR_CAB | PS_WAIT_FOR_BEACON; |
cc65965c JM |
617 | return; |
618 | } | |
619 | ||
1b04b930 | 620 | if (sc->ps_flags & PS_WAIT_FOR_CAB) { |
cc65965c JM |
621 | /* |
622 | * This can happen if a broadcast frame is dropped or the AP | |
623 | * fails to send a frame indicating that all CAB frames have | |
624 | * been delivered. | |
625 | */ | |
1b04b930 | 626 | sc->ps_flags &= ~PS_WAIT_FOR_CAB; |
226afe68 JP |
627 | ath_dbg(common, ATH_DBG_PS, |
628 | "PS wait for CAB frames timed out\n"); | |
cc65965c | 629 | } |
cc65965c JM |
630 | } |
631 | ||
632 | static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb) | |
633 | { | |
634 | struct ieee80211_hdr *hdr; | |
c46917bb | 635 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
cc65965c JM |
636 | |
637 | hdr = (struct ieee80211_hdr *)skb->data; | |
638 | ||
639 | /* Process Beacon and CAB receive in PS state */ | |
ededf1f8 VT |
640 | if (((sc->ps_flags & PS_WAIT_FOR_BEACON) || ath9k_check_auto_sleep(sc)) |
641 | && ieee80211_is_beacon(hdr->frame_control)) | |
cc65965c | 642 | ath_rx_ps_beacon(sc, skb); |
1b04b930 | 643 | else if ((sc->ps_flags & PS_WAIT_FOR_CAB) && |
cc65965c JM |
644 | (ieee80211_is_data(hdr->frame_control) || |
645 | ieee80211_is_action(hdr->frame_control)) && | |
646 | is_multicast_ether_addr(hdr->addr1) && | |
647 | !ieee80211_has_moredata(hdr->frame_control)) { | |
cc65965c JM |
648 | /* |
649 | * No more broadcast/multicast frames to be received at this | |
650 | * point. | |
651 | */ | |
3fac6dfd | 652 | sc->ps_flags &= ~(PS_WAIT_FOR_CAB | PS_WAIT_FOR_BEACON); |
226afe68 JP |
653 | ath_dbg(common, ATH_DBG_PS, |
654 | "All PS CAB frames received, back to sleep\n"); | |
1b04b930 | 655 | } else if ((sc->ps_flags & PS_WAIT_FOR_PSPOLL_DATA) && |
9a23f9ca JM |
656 | !is_multicast_ether_addr(hdr->addr1) && |
657 | !ieee80211_has_morefrags(hdr->frame_control)) { | |
1b04b930 | 658 | sc->ps_flags &= ~PS_WAIT_FOR_PSPOLL_DATA; |
226afe68 JP |
659 | ath_dbg(common, ATH_DBG_PS, |
660 | "Going back to sleep after having received PS-Poll data (0x%lx)\n", | |
1b04b930 S |
661 | sc->ps_flags & (PS_WAIT_FOR_BEACON | |
662 | PS_WAIT_FOR_CAB | | |
663 | PS_WAIT_FOR_PSPOLL_DATA | | |
664 | PS_WAIT_FOR_TX_ACK)); | |
cc65965c JM |
665 | } |
666 | } | |
667 | ||
b5c80475 FF |
668 | static bool ath_edma_get_buffers(struct ath_softc *sc, |
669 | enum ath9k_rx_qtype qtype) | |
f078f209 | 670 | { |
b5c80475 FF |
671 | struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype]; |
672 | struct ath_hw *ah = sc->sc_ah; | |
673 | struct ath_common *common = ath9k_hw_common(ah); | |
674 | struct sk_buff *skb; | |
675 | struct ath_buf *bf; | |
676 | int ret; | |
677 | ||
678 | skb = skb_peek(&rx_edma->rx_fifo); | |
679 | if (!skb) | |
680 | return false; | |
681 | ||
682 | bf = SKB_CB_ATHBUF(skb); | |
683 | BUG_ON(!bf); | |
684 | ||
ce9426d1 | 685 | dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr, |
b5c80475 FF |
686 | common->rx_bufsize, DMA_FROM_DEVICE); |
687 | ||
688 | ret = ath9k_hw_process_rxdesc_edma(ah, NULL, skb->data); | |
ce9426d1 ML |
689 | if (ret == -EINPROGRESS) { |
690 | /*let device gain the buffer again*/ | |
691 | dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, | |
692 | common->rx_bufsize, DMA_FROM_DEVICE); | |
b5c80475 | 693 | return false; |
ce9426d1 | 694 | } |
b5c80475 FF |
695 | |
696 | __skb_unlink(skb, &rx_edma->rx_fifo); | |
697 | if (ret == -EINVAL) { | |
698 | /* corrupt descriptor, skip this one and the following one */ | |
699 | list_add_tail(&bf->list, &sc->rx.rxbuf); | |
700 | ath_rx_edma_buf_link(sc, qtype); | |
701 | skb = skb_peek(&rx_edma->rx_fifo); | |
702 | if (!skb) | |
703 | return true; | |
704 | ||
705 | bf = SKB_CB_ATHBUF(skb); | |
706 | BUG_ON(!bf); | |
707 | ||
708 | __skb_unlink(skb, &rx_edma->rx_fifo); | |
709 | list_add_tail(&bf->list, &sc->rx.rxbuf); | |
710 | ath_rx_edma_buf_link(sc, qtype); | |
083e3e8d | 711 | return true; |
b5c80475 FF |
712 | } |
713 | skb_queue_tail(&rx_edma->rx_buffers, skb); | |
714 | ||
715 | return true; | |
716 | } | |
f078f209 | 717 | |
b5c80475 FF |
718 | static struct ath_buf *ath_edma_get_next_rx_buf(struct ath_softc *sc, |
719 | struct ath_rx_status *rs, | |
720 | enum ath9k_rx_qtype qtype) | |
721 | { | |
722 | struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype]; | |
723 | struct sk_buff *skb; | |
be0418ad | 724 | struct ath_buf *bf; |
b5c80475 FF |
725 | |
726 | while (ath_edma_get_buffers(sc, qtype)); | |
727 | skb = __skb_dequeue(&rx_edma->rx_buffers); | |
728 | if (!skb) | |
729 | return NULL; | |
730 | ||
731 | bf = SKB_CB_ATHBUF(skb); | |
732 | ath9k_hw_process_rxdesc_edma(sc->sc_ah, rs, skb->data); | |
733 | return bf; | |
734 | } | |
735 | ||
736 | static struct ath_buf *ath_get_next_rx_buf(struct ath_softc *sc, | |
737 | struct ath_rx_status *rs) | |
738 | { | |
739 | struct ath_hw *ah = sc->sc_ah; | |
740 | struct ath_common *common = ath9k_hw_common(ah); | |
f078f209 | 741 | struct ath_desc *ds; |
b5c80475 FF |
742 | struct ath_buf *bf; |
743 | int ret; | |
744 | ||
745 | if (list_empty(&sc->rx.rxbuf)) { | |
746 | sc->rx.rxlink = NULL; | |
747 | return NULL; | |
748 | } | |
749 | ||
750 | bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list); | |
751 | ds = bf->bf_desc; | |
752 | ||
753 | /* | |
754 | * Must provide the virtual address of the current | |
755 | * descriptor, the physical address, and the virtual | |
756 | * address of the next descriptor in the h/w chain. | |
757 | * This allows the HAL to look ahead to see if the | |
758 | * hardware is done with a descriptor by checking the | |
759 | * done bit in the following descriptor and the address | |
760 | * of the current descriptor the DMA engine is working | |
761 | * on. All this is necessary because of our use of | |
762 | * a self-linked list to avoid rx overruns. | |
763 | */ | |
764 | ret = ath9k_hw_rxprocdesc(ah, ds, rs, 0); | |
765 | if (ret == -EINPROGRESS) { | |
766 | struct ath_rx_status trs; | |
767 | struct ath_buf *tbf; | |
768 | struct ath_desc *tds; | |
769 | ||
770 | memset(&trs, 0, sizeof(trs)); | |
771 | if (list_is_last(&bf->list, &sc->rx.rxbuf)) { | |
772 | sc->rx.rxlink = NULL; | |
773 | return NULL; | |
774 | } | |
775 | ||
776 | tbf = list_entry(bf->list.next, struct ath_buf, list); | |
777 | ||
778 | /* | |
779 | * On some hardware the descriptor status words could | |
780 | * get corrupted, including the done bit. Because of | |
781 | * this, check if the next descriptor's done bit is | |
782 | * set or not. | |
783 | * | |
784 | * If the next descriptor's done bit is set, the current | |
785 | * descriptor has been corrupted. Force s/w to discard | |
786 | * this descriptor and continue... | |
787 | */ | |
788 | ||
789 | tds = tbf->bf_desc; | |
790 | ret = ath9k_hw_rxprocdesc(ah, tds, &trs, 0); | |
791 | if (ret == -EINPROGRESS) | |
792 | return NULL; | |
793 | } | |
794 | ||
795 | if (!bf->bf_mpdu) | |
796 | return bf; | |
797 | ||
798 | /* | |
799 | * Synchronize the DMA transfer with CPU before | |
800 | * 1. accessing the frame | |
801 | * 2. requeueing the same buffer to h/w | |
802 | */ | |
ce9426d1 | 803 | dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr, |
b5c80475 FF |
804 | common->rx_bufsize, |
805 | DMA_FROM_DEVICE); | |
806 | ||
807 | return bf; | |
808 | } | |
809 | ||
d435700f S |
810 | /* Assumes you've already done the endian to CPU conversion */ |
811 | static bool ath9k_rx_accept(struct ath_common *common, | |
9f167f64 | 812 | struct ieee80211_hdr *hdr, |
d435700f S |
813 | struct ieee80211_rx_status *rxs, |
814 | struct ath_rx_status *rx_stats, | |
815 | bool *decrypt_error) | |
816 | { | |
66760eac | 817 | bool is_mc, is_valid_tkip, strip_mic, mic_error; |
d435700f | 818 | struct ath_hw *ah = common->ah; |
d435700f | 819 | __le16 fc; |
b7b1b512 | 820 | u8 rx_status_len = ah->caps.rx_status_len; |
d435700f | 821 | |
d435700f S |
822 | fc = hdr->frame_control; |
823 | ||
66760eac FF |
824 | is_mc = !!is_multicast_ether_addr(hdr->addr1); |
825 | is_valid_tkip = rx_stats->rs_keyix != ATH9K_RXKEYIX_INVALID && | |
826 | test_bit(rx_stats->rs_keyix, common->tkip_keymap); | |
827 | strip_mic = is_valid_tkip && !(rx_stats->rs_status & | |
828 | (ATH9K_RXERR_DECRYPT | ATH9K_RXERR_CRC | ATH9K_RXERR_MIC)); | |
829 | ||
d435700f S |
830 | if (!rx_stats->rs_datalen) |
831 | return false; | |
832 | /* | |
833 | * rs_status follows rs_datalen so if rs_datalen is too large | |
834 | * we can take a hint that hardware corrupted it, so ignore | |
835 | * those frames. | |
836 | */ | |
b7b1b512 | 837 | if (rx_stats->rs_datalen > (common->rx_bufsize - rx_status_len)) |
d435700f S |
838 | return false; |
839 | ||
0d95521e | 840 | /* Only use error bits from the last fragment */ |
d435700f | 841 | if (rx_stats->rs_more) |
0d95521e | 842 | return true; |
d435700f | 843 | |
66760eac FF |
844 | mic_error = is_valid_tkip && !ieee80211_is_ctl(fc) && |
845 | !ieee80211_has_morefrags(fc) && | |
846 | !(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG) && | |
847 | (rx_stats->rs_status & ATH9K_RXERR_MIC); | |
848 | ||
d435700f S |
849 | /* |
850 | * The rx_stats->rs_status will not be set until the end of the | |
851 | * chained descriptors so it can be ignored if rs_more is set. The | |
852 | * rs_more will be false at the last element of the chained | |
853 | * descriptors. | |
854 | */ | |
855 | if (rx_stats->rs_status != 0) { | |
66760eac | 856 | if (rx_stats->rs_status & ATH9K_RXERR_CRC) { |
d435700f | 857 | rxs->flag |= RX_FLAG_FAILED_FCS_CRC; |
66760eac FF |
858 | mic_error = false; |
859 | } | |
d435700f S |
860 | if (rx_stats->rs_status & ATH9K_RXERR_PHY) |
861 | return false; | |
862 | ||
863 | if (rx_stats->rs_status & ATH9K_RXERR_DECRYPT) { | |
864 | *decrypt_error = true; | |
66760eac | 865 | mic_error = false; |
d435700f | 866 | } |
66760eac | 867 | |
d435700f S |
868 | /* |
869 | * Reject error frames with the exception of | |
870 | * decryption and MIC failures. For monitor mode, | |
871 | * we also ignore the CRC error. | |
872 | */ | |
5f841b41 | 873 | if (ah->is_monitoring) { |
d435700f S |
874 | if (rx_stats->rs_status & |
875 | ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC | | |
876 | ATH9K_RXERR_CRC)) | |
877 | return false; | |
878 | } else { | |
879 | if (rx_stats->rs_status & | |
880 | ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) { | |
881 | return false; | |
882 | } | |
883 | } | |
884 | } | |
66760eac FF |
885 | |
886 | /* | |
887 | * For unicast frames the MIC error bit can have false positives, | |
888 | * so all MIC error reports need to be validated in software. | |
889 | * False negatives are not common, so skip software verification | |
890 | * if the hardware considers the MIC valid. | |
891 | */ | |
892 | if (strip_mic) | |
893 | rxs->flag |= RX_FLAG_MMIC_STRIPPED; | |
894 | else if (is_mc && mic_error) | |
895 | rxs->flag |= RX_FLAG_MMIC_ERROR; | |
896 | ||
d435700f S |
897 | return true; |
898 | } | |
899 | ||
900 | static int ath9k_process_rate(struct ath_common *common, | |
901 | struct ieee80211_hw *hw, | |
902 | struct ath_rx_status *rx_stats, | |
9f167f64 | 903 | struct ieee80211_rx_status *rxs) |
d435700f S |
904 | { |
905 | struct ieee80211_supported_band *sband; | |
906 | enum ieee80211_band band; | |
907 | unsigned int i = 0; | |
908 | ||
909 | band = hw->conf.channel->band; | |
910 | sband = hw->wiphy->bands[band]; | |
911 | ||
912 | if (rx_stats->rs_rate & 0x80) { | |
913 | /* HT rate */ | |
914 | rxs->flag |= RX_FLAG_HT; | |
915 | if (rx_stats->rs_flags & ATH9K_RX_2040) | |
916 | rxs->flag |= RX_FLAG_40MHZ; | |
917 | if (rx_stats->rs_flags & ATH9K_RX_GI) | |
918 | rxs->flag |= RX_FLAG_SHORT_GI; | |
919 | rxs->rate_idx = rx_stats->rs_rate & 0x7f; | |
920 | return 0; | |
921 | } | |
922 | ||
923 | for (i = 0; i < sband->n_bitrates; i++) { | |
924 | if (sband->bitrates[i].hw_value == rx_stats->rs_rate) { | |
925 | rxs->rate_idx = i; | |
926 | return 0; | |
927 | } | |
928 | if (sband->bitrates[i].hw_value_short == rx_stats->rs_rate) { | |
929 | rxs->flag |= RX_FLAG_SHORTPRE; | |
930 | rxs->rate_idx = i; | |
931 | return 0; | |
932 | } | |
933 | } | |
934 | ||
935 | /* | |
936 | * No valid hardware bitrate found -- we should not get here | |
937 | * because hardware has already validated this frame as OK. | |
938 | */ | |
226afe68 JP |
939 | ath_dbg(common, ATH_DBG_XMIT, |
940 | "unsupported hw bitrate detected 0x%02x using 1 Mbit\n", | |
941 | rx_stats->rs_rate); | |
d435700f S |
942 | |
943 | return -EINVAL; | |
944 | } | |
945 | ||
946 | static void ath9k_process_rssi(struct ath_common *common, | |
947 | struct ieee80211_hw *hw, | |
9f167f64 | 948 | struct ieee80211_hdr *hdr, |
d435700f S |
949 | struct ath_rx_status *rx_stats) |
950 | { | |
9ac58615 | 951 | struct ath_softc *sc = hw->priv; |
d435700f | 952 | struct ath_hw *ah = common->ah; |
9fa23e17 | 953 | int last_rssi; |
d435700f S |
954 | __le16 fc; |
955 | ||
2b892a98 RM |
956 | if ((ah->opmode != NL80211_IFTYPE_STATION) && |
957 | (ah->opmode != NL80211_IFTYPE_ADHOC)) | |
9fa23e17 FF |
958 | return; |
959 | ||
d435700f | 960 | fc = hdr->frame_control; |
9fa23e17 | 961 | if (!ieee80211_is_beacon(fc) || |
4801416c BG |
962 | compare_ether_addr(hdr->addr3, common->curbssid)) { |
963 | /* TODO: This doesn't work well if you have stations | |
964 | * associated to two different APs because curbssid | |
965 | * is just the last AP that any of the stations associated | |
966 | * with. | |
967 | */ | |
9fa23e17 | 968 | return; |
4801416c | 969 | } |
d435700f | 970 | |
9fa23e17 | 971 | if (rx_stats->rs_rssi != ATH9K_RSSI_BAD && !rx_stats->rs_moreaggr) |
9ac58615 | 972 | ATH_RSSI_LPF(sc->last_rssi, rx_stats->rs_rssi); |
d435700f | 973 | |
9ac58615 | 974 | last_rssi = sc->last_rssi; |
d435700f S |
975 | if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER)) |
976 | rx_stats->rs_rssi = ATH_EP_RND(last_rssi, | |
977 | ATH_RSSI_EP_MULTIPLIER); | |
978 | if (rx_stats->rs_rssi < 0) | |
979 | rx_stats->rs_rssi = 0; | |
980 | ||
981 | /* Update Beacon RSSI, this is used by ANI. */ | |
9fa23e17 | 982 | ah->stats.avgbrssi = rx_stats->rs_rssi; |
d435700f S |
983 | } |
984 | ||
985 | /* | |
986 | * For Decrypt or Demic errors, we only mark packet status here and always push | |
987 | * up the frame up to let mac80211 handle the actual error case, be it no | |
988 | * decryption key or real decryption error. This let us keep statistics there. | |
989 | */ | |
990 | static int ath9k_rx_skb_preprocess(struct ath_common *common, | |
991 | struct ieee80211_hw *hw, | |
9f167f64 | 992 | struct ieee80211_hdr *hdr, |
d435700f S |
993 | struct ath_rx_status *rx_stats, |
994 | struct ieee80211_rx_status *rx_status, | |
995 | bool *decrypt_error) | |
996 | { | |
f749b946 FF |
997 | struct ath_hw *ah = common->ah; |
998 | ||
d435700f S |
999 | memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); |
1000 | ||
1001 | /* | |
1002 | * everything but the rate is checked here, the rate check is done | |
1003 | * separately to avoid doing two lookups for a rate for each frame. | |
1004 | */ | |
9f167f64 | 1005 | if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error)) |
d435700f S |
1006 | return -EINVAL; |
1007 | ||
0d95521e FF |
1008 | /* Only use status info from the last fragment */ |
1009 | if (rx_stats->rs_more) | |
1010 | return 0; | |
1011 | ||
9f167f64 | 1012 | ath9k_process_rssi(common, hw, hdr, rx_stats); |
d435700f | 1013 | |
9f167f64 | 1014 | if (ath9k_process_rate(common, hw, rx_stats, rx_status)) |
d435700f S |
1015 | return -EINVAL; |
1016 | ||
d435700f S |
1017 | rx_status->band = hw->conf.channel->band; |
1018 | rx_status->freq = hw->conf.channel->center_freq; | |
f749b946 | 1019 | rx_status->signal = ah->noise + rx_stats->rs_rssi; |
d435700f | 1020 | rx_status->antenna = rx_stats->rs_antenna; |
6ebacbb7 | 1021 | rx_status->flag |= RX_FLAG_MACTIME_MPDU; |
d435700f S |
1022 | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static void ath9k_rx_skb_postprocess(struct ath_common *common, | |
1027 | struct sk_buff *skb, | |
1028 | struct ath_rx_status *rx_stats, | |
1029 | struct ieee80211_rx_status *rxs, | |
1030 | bool decrypt_error) | |
1031 | { | |
1032 | struct ath_hw *ah = common->ah; | |
1033 | struct ieee80211_hdr *hdr; | |
1034 | int hdrlen, padpos, padsize; | |
1035 | u8 keyix; | |
1036 | __le16 fc; | |
1037 | ||
1038 | /* see if any padding is done by the hw and remove it */ | |
1039 | hdr = (struct ieee80211_hdr *) skb->data; | |
1040 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1041 | fc = hdr->frame_control; | |
1042 | padpos = ath9k_cmn_padpos(hdr->frame_control); | |
1043 | ||
1044 | /* The MAC header is padded to have 32-bit boundary if the | |
1045 | * packet payload is non-zero. The general calculation for | |
1046 | * padsize would take into account odd header lengths: | |
1047 | * padsize = (4 - padpos % 4) % 4; However, since only | |
1048 | * even-length headers are used, padding can only be 0 or 2 | |
1049 | * bytes and we can optimize this a bit. In addition, we must | |
1050 | * not try to remove padding from short control frames that do | |
1051 | * not have payload. */ | |
1052 | padsize = padpos & 3; | |
1053 | if (padsize && skb->len>=padpos+padsize+FCS_LEN) { | |
1054 | memmove(skb->data + padsize, skb->data, padpos); | |
1055 | skb_pull(skb, padsize); | |
1056 | } | |
1057 | ||
1058 | keyix = rx_stats->rs_keyix; | |
1059 | ||
1060 | if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error && | |
1061 | ieee80211_has_protected(fc)) { | |
1062 | rxs->flag |= RX_FLAG_DECRYPTED; | |
1063 | } else if (ieee80211_has_protected(fc) | |
1064 | && !decrypt_error && skb->len >= hdrlen + 4) { | |
1065 | keyix = skb->data[hdrlen + 3] >> 6; | |
1066 | ||
1067 | if (test_bit(keyix, common->keymap)) | |
1068 | rxs->flag |= RX_FLAG_DECRYPTED; | |
1069 | } | |
1070 | if (ah->sw_mgmt_crypto && | |
1071 | (rxs->flag & RX_FLAG_DECRYPTED) && | |
1072 | ieee80211_is_mgmt(fc)) | |
1073 | /* Use software decrypt for management frames. */ | |
1074 | rxs->flag &= ~RX_FLAG_DECRYPTED; | |
1075 | } | |
b5c80475 | 1076 | |
102885a5 VT |
1077 | static void ath_lnaconf_alt_good_scan(struct ath_ant_comb *antcomb, |
1078 | struct ath_hw_antcomb_conf ant_conf, | |
1079 | int main_rssi_avg) | |
1080 | { | |
1081 | antcomb->quick_scan_cnt = 0; | |
1082 | ||
1083 | if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA2) | |
1084 | antcomb->rssi_lna2 = main_rssi_avg; | |
1085 | else if (ant_conf.main_lna_conf == ATH_ANT_DIV_COMB_LNA1) | |
1086 | antcomb->rssi_lna1 = main_rssi_avg; | |
1087 | ||
1088 | switch ((ant_conf.main_lna_conf << 4) | ant_conf.alt_lna_conf) { | |
223c5a87 | 1089 | case 0x10: /* LNA2 A-B */ |
102885a5 VT |
1090 | antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
1091 | antcomb->first_quick_scan_conf = | |
1092 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1093 | antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1; | |
1094 | break; | |
223c5a87 | 1095 | case 0x20: /* LNA1 A-B */ |
102885a5 VT |
1096 | antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; |
1097 | antcomb->first_quick_scan_conf = | |
1098 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1099 | antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2; | |
1100 | break; | |
223c5a87 | 1101 | case 0x21: /* LNA1 LNA2 */ |
102885a5 VT |
1102 | antcomb->main_conf = ATH_ANT_DIV_COMB_LNA2; |
1103 | antcomb->first_quick_scan_conf = | |
1104 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1105 | antcomb->second_quick_scan_conf = | |
1106 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1107 | break; | |
223c5a87 | 1108 | case 0x12: /* LNA2 LNA1 */ |
102885a5 VT |
1109 | antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1; |
1110 | antcomb->first_quick_scan_conf = | |
1111 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1112 | antcomb->second_quick_scan_conf = | |
1113 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1114 | break; | |
223c5a87 | 1115 | case 0x13: /* LNA2 A+B */ |
102885a5 VT |
1116 | antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
1117 | antcomb->first_quick_scan_conf = | |
1118 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1119 | antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA1; | |
1120 | break; | |
223c5a87 | 1121 | case 0x23: /* LNA1 A+B */ |
102885a5 VT |
1122 | antcomb->main_conf = ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; |
1123 | antcomb->first_quick_scan_conf = | |
1124 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1125 | antcomb->second_quick_scan_conf = ATH_ANT_DIV_COMB_LNA2; | |
1126 | break; | |
1127 | default: | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | static void ath_select_ant_div_from_quick_scan(struct ath_ant_comb *antcomb, | |
1133 | struct ath_hw_antcomb_conf *div_ant_conf, | |
1134 | int main_rssi_avg, int alt_rssi_avg, | |
1135 | int alt_ratio) | |
1136 | { | |
1137 | /* alt_good */ | |
1138 | switch (antcomb->quick_scan_cnt) { | |
1139 | case 0: | |
1140 | /* set alt to main, and alt to first conf */ | |
1141 | div_ant_conf->main_lna_conf = antcomb->main_conf; | |
1142 | div_ant_conf->alt_lna_conf = antcomb->first_quick_scan_conf; | |
1143 | break; | |
1144 | case 1: | |
1145 | /* set alt to main, and alt to first conf */ | |
1146 | div_ant_conf->main_lna_conf = antcomb->main_conf; | |
1147 | div_ant_conf->alt_lna_conf = antcomb->second_quick_scan_conf; | |
1148 | antcomb->rssi_first = main_rssi_avg; | |
1149 | antcomb->rssi_second = alt_rssi_avg; | |
1150 | ||
1151 | if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { | |
1152 | /* main is LNA1 */ | |
1153 | if (ath_is_alt_ant_ratio_better(alt_ratio, | |
1154 | ATH_ANT_DIV_COMB_LNA1_DELTA_HI, | |
1155 | ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, | |
1156 | main_rssi_avg, alt_rssi_avg, | |
1157 | antcomb->total_pkt_count)) | |
1158 | antcomb->first_ratio = true; | |
1159 | else | |
1160 | antcomb->first_ratio = false; | |
1161 | } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { | |
1162 | if (ath_is_alt_ant_ratio_better(alt_ratio, | |
1163 | ATH_ANT_DIV_COMB_LNA1_DELTA_MID, | |
1164 | ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, | |
1165 | main_rssi_avg, alt_rssi_avg, | |
1166 | antcomb->total_pkt_count)) | |
1167 | antcomb->first_ratio = true; | |
1168 | else | |
1169 | antcomb->first_ratio = false; | |
1170 | } else { | |
1171 | if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) && | |
1172 | (alt_rssi_avg > main_rssi_avg + | |
1173 | ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) || | |
1174 | (alt_rssi_avg > main_rssi_avg)) && | |
1175 | (antcomb->total_pkt_count > 50)) | |
1176 | antcomb->first_ratio = true; | |
1177 | else | |
1178 | antcomb->first_ratio = false; | |
1179 | } | |
1180 | break; | |
1181 | case 2: | |
1182 | antcomb->alt_good = false; | |
1183 | antcomb->scan_not_start = false; | |
1184 | antcomb->scan = false; | |
1185 | antcomb->rssi_first = main_rssi_avg; | |
1186 | antcomb->rssi_third = alt_rssi_avg; | |
1187 | ||
1188 | if (antcomb->second_quick_scan_conf == ATH_ANT_DIV_COMB_LNA1) | |
1189 | antcomb->rssi_lna1 = alt_rssi_avg; | |
1190 | else if (antcomb->second_quick_scan_conf == | |
1191 | ATH_ANT_DIV_COMB_LNA2) | |
1192 | antcomb->rssi_lna2 = alt_rssi_avg; | |
1193 | else if (antcomb->second_quick_scan_conf == | |
1194 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2) { | |
1195 | if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) | |
1196 | antcomb->rssi_lna2 = main_rssi_avg; | |
1197 | else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) | |
1198 | antcomb->rssi_lna1 = main_rssi_avg; | |
1199 | } | |
1200 | ||
1201 | if (antcomb->rssi_lna2 > antcomb->rssi_lna1 + | |
1202 | ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA) | |
1203 | div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA2; | |
1204 | else | |
1205 | div_ant_conf->main_lna_conf = ATH_ANT_DIV_COMB_LNA1; | |
1206 | ||
1207 | if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) { | |
1208 | if (ath_is_alt_ant_ratio_better(alt_ratio, | |
1209 | ATH_ANT_DIV_COMB_LNA1_DELTA_HI, | |
1210 | ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, | |
1211 | main_rssi_avg, alt_rssi_avg, | |
1212 | antcomb->total_pkt_count)) | |
1213 | antcomb->second_ratio = true; | |
1214 | else | |
1215 | antcomb->second_ratio = false; | |
1216 | } else if (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2) { | |
1217 | if (ath_is_alt_ant_ratio_better(alt_ratio, | |
1218 | ATH_ANT_DIV_COMB_LNA1_DELTA_MID, | |
1219 | ATH_ANT_DIV_COMB_LNA1_DELTA_LOW, | |
1220 | main_rssi_avg, alt_rssi_avg, | |
1221 | antcomb->total_pkt_count)) | |
1222 | antcomb->second_ratio = true; | |
1223 | else | |
1224 | antcomb->second_ratio = false; | |
1225 | } else { | |
1226 | if ((((alt_ratio >= ATH_ANT_DIV_COMB_ALT_ANT_RATIO2) && | |
1227 | (alt_rssi_avg > main_rssi_avg + | |
1228 | ATH_ANT_DIV_COMB_LNA1_DELTA_HI)) || | |
1229 | (alt_rssi_avg > main_rssi_avg)) && | |
1230 | (antcomb->total_pkt_count > 50)) | |
1231 | antcomb->second_ratio = true; | |
1232 | else | |
1233 | antcomb->second_ratio = false; | |
1234 | } | |
1235 | ||
1236 | /* set alt to the conf with maximun ratio */ | |
1237 | if (antcomb->first_ratio && antcomb->second_ratio) { | |
1238 | if (antcomb->rssi_second > antcomb->rssi_third) { | |
1239 | /* first alt*/ | |
1240 | if ((antcomb->first_quick_scan_conf == | |
1241 | ATH_ANT_DIV_COMB_LNA1) || | |
1242 | (antcomb->first_quick_scan_conf == | |
1243 | ATH_ANT_DIV_COMB_LNA2)) | |
1244 | /* Set alt LNA1 or LNA2*/ | |
1245 | if (div_ant_conf->main_lna_conf == | |
1246 | ATH_ANT_DIV_COMB_LNA2) | |
1247 | div_ant_conf->alt_lna_conf = | |
1248 | ATH_ANT_DIV_COMB_LNA1; | |
1249 | else | |
1250 | div_ant_conf->alt_lna_conf = | |
1251 | ATH_ANT_DIV_COMB_LNA2; | |
1252 | else | |
1253 | /* Set alt to A+B or A-B */ | |
1254 | div_ant_conf->alt_lna_conf = | |
1255 | antcomb->first_quick_scan_conf; | |
1256 | } else if ((antcomb->second_quick_scan_conf == | |
1257 | ATH_ANT_DIV_COMB_LNA1) || | |
1258 | (antcomb->second_quick_scan_conf == | |
1259 | ATH_ANT_DIV_COMB_LNA2)) { | |
1260 | /* Set alt LNA1 or LNA2 */ | |
1261 | if (div_ant_conf->main_lna_conf == | |
1262 | ATH_ANT_DIV_COMB_LNA2) | |
1263 | div_ant_conf->alt_lna_conf = | |
1264 | ATH_ANT_DIV_COMB_LNA1; | |
1265 | else | |
1266 | div_ant_conf->alt_lna_conf = | |
1267 | ATH_ANT_DIV_COMB_LNA2; | |
1268 | } else { | |
1269 | /* Set alt to A+B or A-B */ | |
1270 | div_ant_conf->alt_lna_conf = | |
1271 | antcomb->second_quick_scan_conf; | |
1272 | } | |
1273 | } else if (antcomb->first_ratio) { | |
1274 | /* first alt */ | |
1275 | if ((antcomb->first_quick_scan_conf == | |
1276 | ATH_ANT_DIV_COMB_LNA1) || | |
1277 | (antcomb->first_quick_scan_conf == | |
1278 | ATH_ANT_DIV_COMB_LNA2)) | |
1279 | /* Set alt LNA1 or LNA2 */ | |
1280 | if (div_ant_conf->main_lna_conf == | |
1281 | ATH_ANT_DIV_COMB_LNA2) | |
1282 | div_ant_conf->alt_lna_conf = | |
1283 | ATH_ANT_DIV_COMB_LNA1; | |
1284 | else | |
1285 | div_ant_conf->alt_lna_conf = | |
1286 | ATH_ANT_DIV_COMB_LNA2; | |
1287 | else | |
1288 | /* Set alt to A+B or A-B */ | |
1289 | div_ant_conf->alt_lna_conf = | |
1290 | antcomb->first_quick_scan_conf; | |
1291 | } else if (antcomb->second_ratio) { | |
1292 | /* second alt */ | |
1293 | if ((antcomb->second_quick_scan_conf == | |
1294 | ATH_ANT_DIV_COMB_LNA1) || | |
1295 | (antcomb->second_quick_scan_conf == | |
1296 | ATH_ANT_DIV_COMB_LNA2)) | |
1297 | /* Set alt LNA1 or LNA2 */ | |
1298 | if (div_ant_conf->main_lna_conf == | |
1299 | ATH_ANT_DIV_COMB_LNA2) | |
1300 | div_ant_conf->alt_lna_conf = | |
1301 | ATH_ANT_DIV_COMB_LNA1; | |
1302 | else | |
1303 | div_ant_conf->alt_lna_conf = | |
1304 | ATH_ANT_DIV_COMB_LNA2; | |
1305 | else | |
1306 | /* Set alt to A+B or A-B */ | |
1307 | div_ant_conf->alt_lna_conf = | |
1308 | antcomb->second_quick_scan_conf; | |
1309 | } else { | |
1310 | /* main is largest */ | |
1311 | if ((antcomb->main_conf == ATH_ANT_DIV_COMB_LNA1) || | |
1312 | (antcomb->main_conf == ATH_ANT_DIV_COMB_LNA2)) | |
1313 | /* Set alt LNA1 or LNA2 */ | |
1314 | if (div_ant_conf->main_lna_conf == | |
1315 | ATH_ANT_DIV_COMB_LNA2) | |
1316 | div_ant_conf->alt_lna_conf = | |
1317 | ATH_ANT_DIV_COMB_LNA1; | |
1318 | else | |
1319 | div_ant_conf->alt_lna_conf = | |
1320 | ATH_ANT_DIV_COMB_LNA2; | |
1321 | else | |
1322 | /* Set alt to A+B or A-B */ | |
1323 | div_ant_conf->alt_lna_conf = antcomb->main_conf; | |
1324 | } | |
1325 | break; | |
1326 | default: | |
1327 | break; | |
1328 | } | |
1329 | } | |
1330 | ||
3e9a212a MSS |
1331 | static void ath_ant_div_conf_fast_divbias(struct ath_hw_antcomb_conf *ant_conf, |
1332 | struct ath_ant_comb *antcomb, int alt_ratio) | |
102885a5 | 1333 | { |
3e9a212a MSS |
1334 | if (ant_conf->div_group == 0) { |
1335 | /* Adjust the fast_div_bias based on main and alt lna conf */ | |
1336 | switch ((ant_conf->main_lna_conf << 4) | | |
1337 | ant_conf->alt_lna_conf) { | |
223c5a87 | 1338 | case 0x01: /* A-B LNA2 */ |
3e9a212a MSS |
1339 | ant_conf->fast_div_bias = 0x3b; |
1340 | break; | |
223c5a87 | 1341 | case 0x02: /* A-B LNA1 */ |
3e9a212a MSS |
1342 | ant_conf->fast_div_bias = 0x3d; |
1343 | break; | |
223c5a87 | 1344 | case 0x03: /* A-B A+B */ |
3e9a212a MSS |
1345 | ant_conf->fast_div_bias = 0x1; |
1346 | break; | |
223c5a87 | 1347 | case 0x10: /* LNA2 A-B */ |
3e9a212a MSS |
1348 | ant_conf->fast_div_bias = 0x7; |
1349 | break; | |
223c5a87 | 1350 | case 0x12: /* LNA2 LNA1 */ |
3e9a212a MSS |
1351 | ant_conf->fast_div_bias = 0x2; |
1352 | break; | |
223c5a87 | 1353 | case 0x13: /* LNA2 A+B */ |
3e9a212a MSS |
1354 | ant_conf->fast_div_bias = 0x7; |
1355 | break; | |
223c5a87 | 1356 | case 0x20: /* LNA1 A-B */ |
3e9a212a MSS |
1357 | ant_conf->fast_div_bias = 0x6; |
1358 | break; | |
223c5a87 | 1359 | case 0x21: /* LNA1 LNA2 */ |
3e9a212a MSS |
1360 | ant_conf->fast_div_bias = 0x0; |
1361 | break; | |
223c5a87 | 1362 | case 0x23: /* LNA1 A+B */ |
3e9a212a MSS |
1363 | ant_conf->fast_div_bias = 0x6; |
1364 | break; | |
223c5a87 | 1365 | case 0x30: /* A+B A-B */ |
3e9a212a MSS |
1366 | ant_conf->fast_div_bias = 0x1; |
1367 | break; | |
223c5a87 | 1368 | case 0x31: /* A+B LNA2 */ |
3e9a212a MSS |
1369 | ant_conf->fast_div_bias = 0x3b; |
1370 | break; | |
223c5a87 | 1371 | case 0x32: /* A+B LNA1 */ |
3e9a212a MSS |
1372 | ant_conf->fast_div_bias = 0x3d; |
1373 | break; | |
1374 | default: | |
1375 | break; | |
1376 | } | |
e7ef5bc0 GJ |
1377 | } else if (ant_conf->div_group == 1) { |
1378 | /* Adjust the fast_div_bias based on main and alt_lna_conf */ | |
1379 | switch ((ant_conf->main_lna_conf << 4) | | |
1380 | ant_conf->alt_lna_conf) { | |
1381 | case 0x01: /* A-B LNA2 */ | |
1382 | ant_conf->fast_div_bias = 0x1; | |
1383 | ant_conf->main_gaintb = 0; | |
1384 | ant_conf->alt_gaintb = 0; | |
1385 | break; | |
1386 | case 0x02: /* A-B LNA1 */ | |
1387 | ant_conf->fast_div_bias = 0x1; | |
1388 | ant_conf->main_gaintb = 0; | |
1389 | ant_conf->alt_gaintb = 0; | |
1390 | break; | |
1391 | case 0x03: /* A-B A+B */ | |
1392 | ant_conf->fast_div_bias = 0x1; | |
1393 | ant_conf->main_gaintb = 0; | |
1394 | ant_conf->alt_gaintb = 0; | |
1395 | break; | |
1396 | case 0x10: /* LNA2 A-B */ | |
1397 | if (!(antcomb->scan) && | |
1398 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1399 | ant_conf->fast_div_bias = 0x3f; | |
1400 | else | |
1401 | ant_conf->fast_div_bias = 0x1; | |
1402 | ant_conf->main_gaintb = 0; | |
1403 | ant_conf->alt_gaintb = 0; | |
1404 | break; | |
1405 | case 0x12: /* LNA2 LNA1 */ | |
1406 | ant_conf->fast_div_bias = 0x1; | |
1407 | ant_conf->main_gaintb = 0; | |
1408 | ant_conf->alt_gaintb = 0; | |
1409 | break; | |
1410 | case 0x13: /* LNA2 A+B */ | |
1411 | if (!(antcomb->scan) && | |
1412 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1413 | ant_conf->fast_div_bias = 0x3f; | |
1414 | else | |
1415 | ant_conf->fast_div_bias = 0x1; | |
1416 | ant_conf->main_gaintb = 0; | |
1417 | ant_conf->alt_gaintb = 0; | |
1418 | break; | |
1419 | case 0x20: /* LNA1 A-B */ | |
1420 | if (!(antcomb->scan) && | |
1421 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1422 | ant_conf->fast_div_bias = 0x3f; | |
1423 | else | |
1424 | ant_conf->fast_div_bias = 0x1; | |
1425 | ant_conf->main_gaintb = 0; | |
1426 | ant_conf->alt_gaintb = 0; | |
1427 | break; | |
1428 | case 0x21: /* LNA1 LNA2 */ | |
1429 | ant_conf->fast_div_bias = 0x1; | |
1430 | ant_conf->main_gaintb = 0; | |
1431 | ant_conf->alt_gaintb = 0; | |
1432 | break; | |
1433 | case 0x23: /* LNA1 A+B */ | |
1434 | if (!(antcomb->scan) && | |
1435 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1436 | ant_conf->fast_div_bias = 0x3f; | |
1437 | else | |
1438 | ant_conf->fast_div_bias = 0x1; | |
1439 | ant_conf->main_gaintb = 0; | |
1440 | ant_conf->alt_gaintb = 0; | |
1441 | break; | |
1442 | case 0x30: /* A+B A-B */ | |
1443 | ant_conf->fast_div_bias = 0x1; | |
1444 | ant_conf->main_gaintb = 0; | |
1445 | ant_conf->alt_gaintb = 0; | |
1446 | break; | |
1447 | case 0x31: /* A+B LNA2 */ | |
1448 | ant_conf->fast_div_bias = 0x1; | |
1449 | ant_conf->main_gaintb = 0; | |
1450 | ant_conf->alt_gaintb = 0; | |
1451 | break; | |
1452 | case 0x32: /* A+B LNA1 */ | |
1453 | ant_conf->fast_div_bias = 0x1; | |
1454 | ant_conf->main_gaintb = 0; | |
1455 | ant_conf->alt_gaintb = 0; | |
1456 | break; | |
1457 | default: | |
1458 | break; | |
1459 | } | |
3e9a212a MSS |
1460 | } else if (ant_conf->div_group == 2) { |
1461 | /* Adjust the fast_div_bias based on main and alt_lna_conf */ | |
1462 | switch ((ant_conf->main_lna_conf << 4) | | |
1463 | ant_conf->alt_lna_conf) { | |
223c5a87 | 1464 | case 0x01: /* A-B LNA2 */ |
3e9a212a MSS |
1465 | ant_conf->fast_div_bias = 0x1; |
1466 | ant_conf->main_gaintb = 0; | |
1467 | ant_conf->alt_gaintb = 0; | |
1468 | break; | |
223c5a87 | 1469 | case 0x02: /* A-B LNA1 */ |
3e9a212a MSS |
1470 | ant_conf->fast_div_bias = 0x1; |
1471 | ant_conf->main_gaintb = 0; | |
1472 | ant_conf->alt_gaintb = 0; | |
1473 | break; | |
223c5a87 | 1474 | case 0x03: /* A-B A+B */ |
3e9a212a MSS |
1475 | ant_conf->fast_div_bias = 0x1; |
1476 | ant_conf->main_gaintb = 0; | |
1477 | ant_conf->alt_gaintb = 0; | |
1478 | break; | |
223c5a87 | 1479 | case 0x10: /* LNA2 A-B */ |
3e9a212a MSS |
1480 | if (!(antcomb->scan) && |
1481 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1482 | ant_conf->fast_div_bias = 0x1; | |
1483 | else | |
1484 | ant_conf->fast_div_bias = 0x2; | |
1485 | ant_conf->main_gaintb = 0; | |
1486 | ant_conf->alt_gaintb = 0; | |
1487 | break; | |
223c5a87 | 1488 | case 0x12: /* LNA2 LNA1 */ |
3e9a212a MSS |
1489 | ant_conf->fast_div_bias = 0x1; |
1490 | ant_conf->main_gaintb = 0; | |
1491 | ant_conf->alt_gaintb = 0; | |
1492 | break; | |
223c5a87 | 1493 | case 0x13: /* LNA2 A+B */ |
3e9a212a MSS |
1494 | if (!(antcomb->scan) && |
1495 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1496 | ant_conf->fast_div_bias = 0x1; | |
1497 | else | |
1498 | ant_conf->fast_div_bias = 0x2; | |
1499 | ant_conf->main_gaintb = 0; | |
1500 | ant_conf->alt_gaintb = 0; | |
1501 | break; | |
223c5a87 | 1502 | case 0x20: /* LNA1 A-B */ |
3e9a212a MSS |
1503 | if (!(antcomb->scan) && |
1504 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1505 | ant_conf->fast_div_bias = 0x1; | |
1506 | else | |
1507 | ant_conf->fast_div_bias = 0x2; | |
1508 | ant_conf->main_gaintb = 0; | |
1509 | ant_conf->alt_gaintb = 0; | |
1510 | break; | |
223c5a87 | 1511 | case 0x21: /* LNA1 LNA2 */ |
3e9a212a MSS |
1512 | ant_conf->fast_div_bias = 0x1; |
1513 | ant_conf->main_gaintb = 0; | |
1514 | ant_conf->alt_gaintb = 0; | |
1515 | break; | |
223c5a87 | 1516 | case 0x23: /* LNA1 A+B */ |
3e9a212a MSS |
1517 | if (!(antcomb->scan) && |
1518 | (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO)) | |
1519 | ant_conf->fast_div_bias = 0x1; | |
1520 | else | |
1521 | ant_conf->fast_div_bias = 0x2; | |
1522 | ant_conf->main_gaintb = 0; | |
1523 | ant_conf->alt_gaintb = 0; | |
1524 | break; | |
223c5a87 | 1525 | case 0x30: /* A+B A-B */ |
3e9a212a MSS |
1526 | ant_conf->fast_div_bias = 0x1; |
1527 | ant_conf->main_gaintb = 0; | |
1528 | ant_conf->alt_gaintb = 0; | |
1529 | break; | |
223c5a87 | 1530 | case 0x31: /* A+B LNA2 */ |
3e9a212a MSS |
1531 | ant_conf->fast_div_bias = 0x1; |
1532 | ant_conf->main_gaintb = 0; | |
1533 | ant_conf->alt_gaintb = 0; | |
1534 | break; | |
223c5a87 | 1535 | case 0x32: /* A+B LNA1 */ |
3e9a212a MSS |
1536 | ant_conf->fast_div_bias = 0x1; |
1537 | ant_conf->main_gaintb = 0; | |
1538 | ant_conf->alt_gaintb = 0; | |
1539 | break; | |
1540 | default: | |
1541 | break; | |
1542 | } | |
102885a5 VT |
1543 | } |
1544 | } | |
1545 | ||
1546 | /* Antenna diversity and combining */ | |
1547 | static void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs) | |
1548 | { | |
1549 | struct ath_hw_antcomb_conf div_ant_conf; | |
1550 | struct ath_ant_comb *antcomb = &sc->ant_comb; | |
1551 | int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set; | |
0ff2b5c0 | 1552 | int curr_main_set; |
102885a5 VT |
1553 | int main_rssi = rs->rs_rssi_ctl0; |
1554 | int alt_rssi = rs->rs_rssi_ctl1; | |
1555 | int rx_ant_conf, main_ant_conf; | |
1556 | bool short_scan = false; | |
1557 | ||
1558 | rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) & | |
1559 | ATH_ANT_RX_MASK; | |
1560 | main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) & | |
1561 | ATH_ANT_RX_MASK; | |
1562 | ||
21e8ee6d MSS |
1563 | /* Record packet only when both main_rssi and alt_rssi is positive */ |
1564 | if (main_rssi > 0 && alt_rssi > 0) { | |
102885a5 VT |
1565 | antcomb->total_pkt_count++; |
1566 | antcomb->main_total_rssi += main_rssi; | |
1567 | antcomb->alt_total_rssi += alt_rssi; | |
1568 | if (main_ant_conf == rx_ant_conf) | |
1569 | antcomb->main_recv_cnt++; | |
1570 | else | |
1571 | antcomb->alt_recv_cnt++; | |
1572 | } | |
1573 | ||
1574 | /* Short scan check */ | |
1575 | if (antcomb->scan && antcomb->alt_good) { | |
1576 | if (time_after(jiffies, antcomb->scan_start_time + | |
1577 | msecs_to_jiffies(ATH_ANT_DIV_COMB_SHORT_SCAN_INTR))) | |
1578 | short_scan = true; | |
1579 | else | |
1580 | if (antcomb->total_pkt_count == | |
1581 | ATH_ANT_DIV_COMB_SHORT_SCAN_PKTCOUNT) { | |
1582 | alt_ratio = ((antcomb->alt_recv_cnt * 100) / | |
1583 | antcomb->total_pkt_count); | |
1584 | if (alt_ratio < ATH_ANT_DIV_COMB_ALT_ANT_RATIO) | |
1585 | short_scan = true; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | if (((antcomb->total_pkt_count < ATH_ANT_DIV_COMB_MAX_PKTCOUNT) || | |
1590 | rs->rs_moreaggr) && !short_scan) | |
1591 | return; | |
1592 | ||
1593 | if (antcomb->total_pkt_count) { | |
1594 | alt_ratio = ((antcomb->alt_recv_cnt * 100) / | |
1595 | antcomb->total_pkt_count); | |
1596 | main_rssi_avg = (antcomb->main_total_rssi / | |
1597 | antcomb->total_pkt_count); | |
1598 | alt_rssi_avg = (antcomb->alt_total_rssi / | |
1599 | antcomb->total_pkt_count); | |
1600 | } | |
1601 | ||
1602 | ||
1603 | ath9k_hw_antdiv_comb_conf_get(sc->sc_ah, &div_ant_conf); | |
1604 | curr_alt_set = div_ant_conf.alt_lna_conf; | |
1605 | curr_main_set = div_ant_conf.main_lna_conf; | |
102885a5 VT |
1606 | |
1607 | antcomb->count++; | |
1608 | ||
1609 | if (antcomb->count == ATH_ANT_DIV_COMB_MAX_COUNT) { | |
1610 | if (alt_ratio > ATH_ANT_DIV_COMB_ALT_ANT_RATIO) { | |
1611 | ath_lnaconf_alt_good_scan(antcomb, div_ant_conf, | |
1612 | main_rssi_avg); | |
1613 | antcomb->alt_good = true; | |
1614 | } else { | |
1615 | antcomb->alt_good = false; | |
1616 | } | |
1617 | ||
1618 | antcomb->count = 0; | |
1619 | antcomb->scan = true; | |
1620 | antcomb->scan_not_start = true; | |
1621 | } | |
1622 | ||
1623 | if (!antcomb->scan) { | |
b85c5734 MSS |
1624 | if (ath_ant_div_comb_alt_check(div_ant_conf.div_group, |
1625 | alt_ratio, curr_main_set, curr_alt_set, | |
1626 | alt_rssi_avg, main_rssi_avg)) { | |
102885a5 VT |
1627 | if (curr_alt_set == ATH_ANT_DIV_COMB_LNA2) { |
1628 | /* Switch main and alt LNA */ | |
1629 | div_ant_conf.main_lna_conf = | |
1630 | ATH_ANT_DIV_COMB_LNA2; | |
1631 | div_ant_conf.alt_lna_conf = | |
1632 | ATH_ANT_DIV_COMB_LNA1; | |
1633 | } else if (curr_alt_set == ATH_ANT_DIV_COMB_LNA1) { | |
1634 | div_ant_conf.main_lna_conf = | |
1635 | ATH_ANT_DIV_COMB_LNA1; | |
1636 | div_ant_conf.alt_lna_conf = | |
1637 | ATH_ANT_DIV_COMB_LNA2; | |
1638 | } | |
1639 | ||
1640 | goto div_comb_done; | |
1641 | } else if ((curr_alt_set != ATH_ANT_DIV_COMB_LNA1) && | |
1642 | (curr_alt_set != ATH_ANT_DIV_COMB_LNA2)) { | |
1643 | /* Set alt to another LNA */ | |
1644 | if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) | |
1645 | div_ant_conf.alt_lna_conf = | |
1646 | ATH_ANT_DIV_COMB_LNA1; | |
1647 | else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) | |
1648 | div_ant_conf.alt_lna_conf = | |
1649 | ATH_ANT_DIV_COMB_LNA2; | |
1650 | ||
1651 | goto div_comb_done; | |
1652 | } | |
1653 | ||
1654 | if ((alt_rssi_avg < (main_rssi_avg + | |
8afbcc8b | 1655 | div_ant_conf.lna1_lna2_delta))) |
102885a5 VT |
1656 | goto div_comb_done; |
1657 | } | |
1658 | ||
1659 | if (!antcomb->scan_not_start) { | |
1660 | switch (curr_alt_set) { | |
1661 | case ATH_ANT_DIV_COMB_LNA2: | |
1662 | antcomb->rssi_lna2 = alt_rssi_avg; | |
1663 | antcomb->rssi_lna1 = main_rssi_avg; | |
1664 | antcomb->scan = true; | |
1665 | /* set to A+B */ | |
1666 | div_ant_conf.main_lna_conf = | |
1667 | ATH_ANT_DIV_COMB_LNA1; | |
1668 | div_ant_conf.alt_lna_conf = | |
1669 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1670 | break; | |
1671 | case ATH_ANT_DIV_COMB_LNA1: | |
1672 | antcomb->rssi_lna1 = alt_rssi_avg; | |
1673 | antcomb->rssi_lna2 = main_rssi_avg; | |
1674 | antcomb->scan = true; | |
1675 | /* set to A+B */ | |
1676 | div_ant_conf.main_lna_conf = ATH_ANT_DIV_COMB_LNA2; | |
1677 | div_ant_conf.alt_lna_conf = | |
1678 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1679 | break; | |
1680 | case ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2: | |
1681 | antcomb->rssi_add = alt_rssi_avg; | |
1682 | antcomb->scan = true; | |
1683 | /* set to A-B */ | |
1684 | div_ant_conf.alt_lna_conf = | |
1685 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1686 | break; | |
1687 | case ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2: | |
1688 | antcomb->rssi_sub = alt_rssi_avg; | |
1689 | antcomb->scan = false; | |
1690 | if (antcomb->rssi_lna2 > | |
1691 | (antcomb->rssi_lna1 + | |
1692 | ATH_ANT_DIV_COMB_LNA1_LNA2_SWITCH_DELTA)) { | |
1693 | /* use LNA2 as main LNA */ | |
1694 | if ((antcomb->rssi_add > antcomb->rssi_lna1) && | |
1695 | (antcomb->rssi_add > antcomb->rssi_sub)) { | |
1696 | /* set to A+B */ | |
1697 | div_ant_conf.main_lna_conf = | |
1698 | ATH_ANT_DIV_COMB_LNA2; | |
1699 | div_ant_conf.alt_lna_conf = | |
1700 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1701 | } else if (antcomb->rssi_sub > | |
1702 | antcomb->rssi_lna1) { | |
1703 | /* set to A-B */ | |
1704 | div_ant_conf.main_lna_conf = | |
1705 | ATH_ANT_DIV_COMB_LNA2; | |
1706 | div_ant_conf.alt_lna_conf = | |
1707 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1708 | } else { | |
1709 | /* set to LNA1 */ | |
1710 | div_ant_conf.main_lna_conf = | |
1711 | ATH_ANT_DIV_COMB_LNA2; | |
1712 | div_ant_conf.alt_lna_conf = | |
1713 | ATH_ANT_DIV_COMB_LNA1; | |
1714 | } | |
1715 | } else { | |
1716 | /* use LNA1 as main LNA */ | |
1717 | if ((antcomb->rssi_add > antcomb->rssi_lna2) && | |
1718 | (antcomb->rssi_add > antcomb->rssi_sub)) { | |
1719 | /* set to A+B */ | |
1720 | div_ant_conf.main_lna_conf = | |
1721 | ATH_ANT_DIV_COMB_LNA1; | |
1722 | div_ant_conf.alt_lna_conf = | |
1723 | ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2; | |
1724 | } else if (antcomb->rssi_sub > | |
1725 | antcomb->rssi_lna1) { | |
1726 | /* set to A-B */ | |
1727 | div_ant_conf.main_lna_conf = | |
1728 | ATH_ANT_DIV_COMB_LNA1; | |
1729 | div_ant_conf.alt_lna_conf = | |
1730 | ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2; | |
1731 | } else { | |
1732 | /* set to LNA2 */ | |
1733 | div_ant_conf.main_lna_conf = | |
1734 | ATH_ANT_DIV_COMB_LNA1; | |
1735 | div_ant_conf.alt_lna_conf = | |
1736 | ATH_ANT_DIV_COMB_LNA2; | |
1737 | } | |
1738 | } | |
1739 | break; | |
1740 | default: | |
1741 | break; | |
1742 | } | |
1743 | } else { | |
1744 | if (!antcomb->alt_good) { | |
1745 | antcomb->scan_not_start = false; | |
1746 | /* Set alt to another LNA */ | |
1747 | if (curr_main_set == ATH_ANT_DIV_COMB_LNA2) { | |
1748 | div_ant_conf.main_lna_conf = | |
1749 | ATH_ANT_DIV_COMB_LNA2; | |
1750 | div_ant_conf.alt_lna_conf = | |
1751 | ATH_ANT_DIV_COMB_LNA1; | |
1752 | } else if (curr_main_set == ATH_ANT_DIV_COMB_LNA1) { | |
1753 | div_ant_conf.main_lna_conf = | |
1754 | ATH_ANT_DIV_COMB_LNA1; | |
1755 | div_ant_conf.alt_lna_conf = | |
1756 | ATH_ANT_DIV_COMB_LNA2; | |
1757 | } | |
1758 | goto div_comb_done; | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | ath_select_ant_div_from_quick_scan(antcomb, &div_ant_conf, | |
1763 | main_rssi_avg, alt_rssi_avg, | |
1764 | alt_ratio); | |
1765 | ||
1766 | antcomb->quick_scan_cnt++; | |
1767 | ||
1768 | div_comb_done: | |
3e9a212a | 1769 | ath_ant_div_conf_fast_divbias(&div_ant_conf, antcomb, alt_ratio); |
102885a5 VT |
1770 | ath9k_hw_antdiv_comb_conf_set(sc->sc_ah, &div_ant_conf); |
1771 | ||
1772 | antcomb->scan_start_time = jiffies; | |
1773 | antcomb->total_pkt_count = 0; | |
1774 | antcomb->main_total_rssi = 0; | |
1775 | antcomb->alt_total_rssi = 0; | |
1776 | antcomb->main_recv_cnt = 0; | |
1777 | antcomb->alt_recv_cnt = 0; | |
1778 | } | |
1779 | ||
b5c80475 FF |
1780 | int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) |
1781 | { | |
1782 | struct ath_buf *bf; | |
0d95521e | 1783 | struct sk_buff *skb = NULL, *requeue_skb, *hdr_skb; |
5ca42627 | 1784 | struct ieee80211_rx_status *rxs; |
cbe61d8a | 1785 | struct ath_hw *ah = sc->sc_ah; |
27c51f1a | 1786 | struct ath_common *common = ath9k_hw_common(ah); |
7545daf4 | 1787 | struct ieee80211_hw *hw = sc->hw; |
be0418ad | 1788 | struct ieee80211_hdr *hdr; |
c9b14170 | 1789 | int retval; |
be0418ad | 1790 | bool decrypt_error = false; |
29bffa96 | 1791 | struct ath_rx_status rs; |
b5c80475 FF |
1792 | enum ath9k_rx_qtype qtype; |
1793 | bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); | |
1794 | int dma_type; | |
5c6dd921 | 1795 | u8 rx_status_len = ah->caps.rx_status_len; |
a6d2055b FF |
1796 | u64 tsf = 0; |
1797 | u32 tsf_lower = 0; | |
8ab2cd09 | 1798 | unsigned long flags; |
be0418ad | 1799 | |
b5c80475 | 1800 | if (edma) |
b5c80475 | 1801 | dma_type = DMA_BIDIRECTIONAL; |
56824223 ML |
1802 | else |
1803 | dma_type = DMA_FROM_DEVICE; | |
b5c80475 FF |
1804 | |
1805 | qtype = hp ? ATH9K_RX_QUEUE_HP : ATH9K_RX_QUEUE_LP; | |
b77f483f | 1806 | spin_lock_bh(&sc->rx.rxbuflock); |
f078f209 | 1807 | |
a6d2055b FF |
1808 | tsf = ath9k_hw_gettsf64(ah); |
1809 | tsf_lower = tsf & 0xffffffff; | |
1810 | ||
f078f209 LR |
1811 | do { |
1812 | /* If handling rx interrupt and flush is in progress => exit */ | |
98deeea0 | 1813 | if ((sc->sc_flags & SC_OP_RXFLUSH) && (flush == 0)) |
f078f209 LR |
1814 | break; |
1815 | ||
29bffa96 | 1816 | memset(&rs, 0, sizeof(rs)); |
b5c80475 FF |
1817 | if (edma) |
1818 | bf = ath_edma_get_next_rx_buf(sc, &rs, qtype); | |
1819 | else | |
1820 | bf = ath_get_next_rx_buf(sc, &rs); | |
f078f209 | 1821 | |
b5c80475 FF |
1822 | if (!bf) |
1823 | break; | |
f078f209 | 1824 | |
f078f209 | 1825 | skb = bf->bf_mpdu; |
be0418ad | 1826 | if (!skb) |
f078f209 | 1827 | continue; |
f078f209 | 1828 | |
0d95521e FF |
1829 | /* |
1830 | * Take frame header from the first fragment and RX status from | |
1831 | * the last one. | |
1832 | */ | |
1833 | if (sc->rx.frag) | |
1834 | hdr_skb = sc->rx.frag; | |
1835 | else | |
1836 | hdr_skb = skb; | |
1837 | ||
1838 | hdr = (struct ieee80211_hdr *) (hdr_skb->data + rx_status_len); | |
1839 | rxs = IEEE80211_SKB_RXCB(hdr_skb); | |
5ca42627 | 1840 | |
29bffa96 | 1841 | ath_debug_stat_rx(sc, &rs); |
1395d3f0 | 1842 | |
f078f209 | 1843 | /* |
be0418ad S |
1844 | * If we're asked to flush receive queue, directly |
1845 | * chain it back at the queue without processing it. | |
f078f209 | 1846 | */ |
be0418ad | 1847 | if (flush) |
0d95521e | 1848 | goto requeue_drop_frag; |
f078f209 | 1849 | |
c8f3b721 JF |
1850 | retval = ath9k_rx_skb_preprocess(common, hw, hdr, &rs, |
1851 | rxs, &decrypt_error); | |
1852 | if (retval) | |
0d95521e | 1853 | goto requeue_drop_frag; |
c8f3b721 | 1854 | |
a6d2055b FF |
1855 | rxs->mactime = (tsf & ~0xffffffffULL) | rs.rs_tstamp; |
1856 | if (rs.rs_tstamp > tsf_lower && | |
1857 | unlikely(rs.rs_tstamp - tsf_lower > 0x10000000)) | |
1858 | rxs->mactime -= 0x100000000ULL; | |
1859 | ||
1860 | if (rs.rs_tstamp < tsf_lower && | |
1861 | unlikely(tsf_lower - rs.rs_tstamp > 0x10000000)) | |
1862 | rxs->mactime += 0x100000000ULL; | |
1863 | ||
cb71d9ba LR |
1864 | /* Ensure we always have an skb to requeue once we are done |
1865 | * processing the current buffer's skb */ | |
cc861f74 | 1866 | requeue_skb = ath_rxbuf_alloc(common, common->rx_bufsize, GFP_ATOMIC); |
cb71d9ba LR |
1867 | |
1868 | /* If there is no memory we ignore the current RX'd frame, | |
1869 | * tell hardware it can give us a new frame using the old | |
b77f483f | 1870 | * skb and put it at the tail of the sc->rx.rxbuf list for |
cb71d9ba LR |
1871 | * processing. */ |
1872 | if (!requeue_skb) | |
0d95521e | 1873 | goto requeue_drop_frag; |
f078f209 | 1874 | |
9bf9fca8 | 1875 | /* Unmap the frame */ |
7da3c55c | 1876 | dma_unmap_single(sc->dev, bf->bf_buf_addr, |
cc861f74 | 1877 | common->rx_bufsize, |
b5c80475 | 1878 | dma_type); |
f078f209 | 1879 | |
b5c80475 FF |
1880 | skb_put(skb, rs.rs_datalen + ah->caps.rx_status_len); |
1881 | if (ah->caps.rx_status_len) | |
1882 | skb_pull(skb, ah->caps.rx_status_len); | |
be0418ad | 1883 | |
0d95521e FF |
1884 | if (!rs.rs_more) |
1885 | ath9k_rx_skb_postprocess(common, hdr_skb, &rs, | |
1886 | rxs, decrypt_error); | |
be0418ad | 1887 | |
cb71d9ba LR |
1888 | /* We will now give hardware our shiny new allocated skb */ |
1889 | bf->bf_mpdu = requeue_skb; | |
7da3c55c | 1890 | bf->bf_buf_addr = dma_map_single(sc->dev, requeue_skb->data, |
cc861f74 | 1891 | common->rx_bufsize, |
b5c80475 | 1892 | dma_type); |
7da3c55c | 1893 | if (unlikely(dma_mapping_error(sc->dev, |
f8316df1 LR |
1894 | bf->bf_buf_addr))) { |
1895 | dev_kfree_skb_any(requeue_skb); | |
1896 | bf->bf_mpdu = NULL; | |
6cf9e995 | 1897 | bf->bf_buf_addr = 0; |
3800276a | 1898 | ath_err(common, "dma_mapping_error() on RX\n"); |
7545daf4 | 1899 | ieee80211_rx(hw, skb); |
f8316df1 LR |
1900 | break; |
1901 | } | |
f078f209 | 1902 | |
0d95521e FF |
1903 | if (rs.rs_more) { |
1904 | /* | |
1905 | * rs_more indicates chained descriptors which can be | |
1906 | * used to link buffers together for a sort of | |
1907 | * scatter-gather operation. | |
1908 | */ | |
1909 | if (sc->rx.frag) { | |
1910 | /* too many fragments - cannot handle frame */ | |
1911 | dev_kfree_skb_any(sc->rx.frag); | |
1912 | dev_kfree_skb_any(skb); | |
1913 | skb = NULL; | |
1914 | } | |
1915 | sc->rx.frag = skb; | |
1916 | goto requeue; | |
1917 | } | |
1918 | ||
1919 | if (sc->rx.frag) { | |
1920 | int space = skb->len - skb_tailroom(hdr_skb); | |
1921 | ||
1922 | sc->rx.frag = NULL; | |
1923 | ||
1924 | if (pskb_expand_head(hdr_skb, 0, space, GFP_ATOMIC) < 0) { | |
1925 | dev_kfree_skb(skb); | |
1926 | goto requeue_drop_frag; | |
1927 | } | |
1928 | ||
1929 | skb_copy_from_linear_data(skb, skb_put(hdr_skb, skb->len), | |
1930 | skb->len); | |
1931 | dev_kfree_skb_any(skb); | |
1932 | skb = hdr_skb; | |
1933 | } | |
1934 | ||
f078f209 LR |
1935 | /* |
1936 | * change the default rx antenna if rx diversity chooses the | |
1937 | * other antenna 3 times in a row. | |
1938 | */ | |
29bffa96 | 1939 | if (sc->rx.defant != rs.rs_antenna) { |
b77f483f | 1940 | if (++sc->rx.rxotherant >= 3) |
29bffa96 | 1941 | ath_setdefantenna(sc, rs.rs_antenna); |
f078f209 | 1942 | } else { |
b77f483f | 1943 | sc->rx.rxotherant = 0; |
f078f209 | 1944 | } |
3cbb5dd7 | 1945 | |
66760eac FF |
1946 | if (rxs->flag & RX_FLAG_MMIC_STRIPPED) |
1947 | skb_trim(skb, skb->len - 8); | |
1948 | ||
8ab2cd09 | 1949 | spin_lock_irqsave(&sc->sc_pm_lock, flags); |
aaef24b4 MSS |
1950 | |
1951 | if ((sc->ps_flags & (PS_WAIT_FOR_BEACON | | |
ededf1f8 | 1952 | PS_WAIT_FOR_CAB | |
aaef24b4 | 1953 | PS_WAIT_FOR_PSPOLL_DATA)) || |
cedc7e3d | 1954 | ath9k_check_auto_sleep(sc)) |
cc65965c | 1955 | ath_rx_ps(sc, skb); |
8ab2cd09 | 1956 | spin_unlock_irqrestore(&sc->sc_pm_lock, flags); |
cc65965c | 1957 | |
102885a5 VT |
1958 | if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) |
1959 | ath_ant_comb_scan(sc, &rs); | |
1960 | ||
7545daf4 | 1961 | ieee80211_rx(hw, skb); |
cc65965c | 1962 | |
0d95521e FF |
1963 | requeue_drop_frag: |
1964 | if (sc->rx.frag) { | |
1965 | dev_kfree_skb_any(sc->rx.frag); | |
1966 | sc->rx.frag = NULL; | |
1967 | } | |
cb71d9ba | 1968 | requeue: |
b5c80475 FF |
1969 | if (edma) { |
1970 | list_add_tail(&bf->list, &sc->rx.rxbuf); | |
1971 | ath_rx_edma_buf_link(sc, qtype); | |
1972 | } else { | |
1973 | list_move_tail(&bf->list, &sc->rx.rxbuf); | |
1974 | ath_rx_buf_link(sc, bf); | |
95294973 | 1975 | ath9k_hw_rxena(ah); |
b5c80475 | 1976 | } |
be0418ad S |
1977 | } while (1); |
1978 | ||
b77f483f | 1979 | spin_unlock_bh(&sc->rx.rxbuflock); |
f078f209 LR |
1980 | |
1981 | return 0; | |
f078f209 | 1982 | } |