1 /*
2 * Copyright (c) 2008-2009 Atheros Communications Inc.
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
17 #include "hw.h"
18 #include "hw-ops.h"
19
ath9k_hw_set_txq_interrupts(struct ath_hw * ah,struct ath9k_tx_queue_info * qi)20 static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah,
21 struct ath9k_tx_queue_info *qi)
22 {
23 ath_dbg(ath9k_hw_common(ah), ATH_DBG_INTERRUPT,
24 "tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n",
25 ah->txok_interrupt_mask, ah->txerr_interrupt_mask,
26 ah->txdesc_interrupt_mask, ah->txeol_interrupt_mask,
27 ah->txurn_interrupt_mask);
28
29 ENABLE_REGWRITE_BUFFER(ah);
30
31 REG_WRITE(ah, AR_IMR_S0,
32 SM(ah->txok_interrupt_mask, AR_IMR_S0_QCU_TXOK)
33 | SM(ah->txdesc_interrupt_mask, AR_IMR_S0_QCU_TXDESC));
34 REG_WRITE(ah, AR_IMR_S1,
35 SM(ah->txerr_interrupt_mask, AR_IMR_S1_QCU_TXERR)
36 | SM(ah->txeol_interrupt_mask, AR_IMR_S1_QCU_TXEOL));
37
38 ah->imrs2_reg &= ~AR_IMR_S2_QCU_TXURN;
39 ah->imrs2_reg |= (ah->txurn_interrupt_mask & AR_IMR_S2_QCU_TXURN);
40 REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
41
42 REGWRITE_BUFFER_FLUSH(ah);
43 }
44
ath9k_hw_gettxbuf(struct ath_hw * ah,u32 q)45 u32 ath9k_hw_gettxbuf(struct ath_hw *ah, u32 q)
46 {
47 return REG_READ(ah, AR_QTXDP(q));
48 }
49 EXPORT_SYMBOL(ath9k_hw_gettxbuf);
50
ath9k_hw_puttxbuf(struct ath_hw * ah,u32 q,u32 txdp)51 void ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
52 {
53 REG_WRITE(ah, AR_QTXDP(q), txdp);
54 }
55 EXPORT_SYMBOL(ath9k_hw_puttxbuf);
56
ath9k_hw_txstart(struct ath_hw * ah,u32 q)57 void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
58 {
59 ath_dbg(ath9k_hw_common(ah), ATH_DBG_QUEUE,
60 "Enable TXE on queue: %u\n", q);
61 REG_WRITE(ah, AR_Q_TXE, 1 << q);
62 }
63 EXPORT_SYMBOL(ath9k_hw_txstart);
64
ath9k_hw_cleartxdesc(struct ath_hw * ah,void * ds)65 void ath9k_hw_cleartxdesc(struct ath_hw *ah, void *ds)
66 {
67 struct ar5416_desc *ads = AR5416DESC(ds);
68
69 ads->ds_txstatus0 = ads->ds_txstatus1 = 0;
70 ads->ds_txstatus2 = ads->ds_txstatus3 = 0;
71 ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
72 ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
73 ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
74 }
75 EXPORT_SYMBOL(ath9k_hw_cleartxdesc);
76
ath9k_hw_numtxpending(struct ath_hw * ah,u32 q)77 u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q)
78 {
79 u32 npend;
80
81 npend = REG_READ(ah, AR_QSTS(q)) & AR_Q_STS_PEND_FR_CNT;
82 if (npend == 0) {
83
84 if (REG_READ(ah, AR_Q_TXE) & (1 << q))
85 npend = 1;
86 }
87
88 return npend;
89 }
90 EXPORT_SYMBOL(ath9k_hw_numtxpending);
91
92 /**
93 * ath9k_hw_updatetxtriglevel - adjusts the frame trigger level
94 *
95 * @ah: atheros hardware struct
96 * @bIncTrigLevel: whether or not the frame trigger level should be updated
97 *
98 * The frame trigger level specifies the minimum number of bytes,
99 * in units of 64 bytes, that must be DMA'ed into the PCU TX FIFO
100 * before the PCU will initiate sending the frame on the air. This can
101 * mean we initiate transmit before a full frame is on the PCU TX FIFO.
102 * Resets to 0x1 (meaning 64 bytes or a full frame, whichever occurs
103 * first)
104 *
105 * Caution must be taken to ensure to set the frame trigger level based
106 * on the DMA request size. For example if the DMA request size is set to
107 * 128 bytes the trigger level cannot exceed 6 * 64 = 384. This is because
108 * there need to be enough space in the tx FIFO for the requested transfer
109 * size. Hence the tx FIFO will stop with 512 - 128 = 384 bytes. If we set
110 * the threshold to a value beyond 6, then the transmit will hang.
111 *
112 * Current dual stream devices have a PCU TX FIFO size of 8 KB.
113 * Current single stream devices have a PCU TX FIFO size of 4 KB, however,
114 * there is a hardware issue which forces us to use 2 KB instead so the
115 * frame trigger level must not exceed 2 KB for these chipsets.
116 */
ath9k_hw_updatetxtriglevel(struct ath_hw * ah,bool bIncTrigLevel)117 bool ath9k_hw_updatetxtriglevel(struct ath_hw *ah, bool bIncTrigLevel)
118 {
119 u32 txcfg, curLevel, newLevel;
120
121 if (ah->tx_trig_level >= ah->config.max_txtrig_level)
122 return false;
123
124 ath9k_hw_disable_interrupts(ah);
125
126 txcfg = REG_READ(ah, AR_TXCFG);
127 curLevel = MS(txcfg, AR_FTRIG);
128 newLevel = curLevel;
129 if (bIncTrigLevel) {
130 if (curLevel < ah->config.max_txtrig_level)
131 newLevel++;
132 } else if (curLevel > MIN_TX_FIFO_THRESHOLD)
133 newLevel--;
134 if (newLevel != curLevel)
135 REG_WRITE(ah, AR_TXCFG,
136 (txcfg & ~AR_FTRIG) | SM(newLevel, AR_FTRIG));
137
138 ath9k_hw_enable_interrupts(ah);
139
140 ah->tx_trig_level = newLevel;
141
142 return newLevel != curLevel;
143 }
144 EXPORT_SYMBOL(ath9k_hw_updatetxtriglevel);
145
ath9k_hw_abort_tx_dma(struct ath_hw * ah)146 void ath9k_hw_abort_tx_dma(struct ath_hw *ah)
147 {
148 int i, q;
149
150 REG_WRITE(ah, AR_Q_TXD, AR_Q_TXD_M);
151
152 REG_SET_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
153 REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
154 REG_SET_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
155
156 for (q = 0; q < AR_NUM_QCU; q++) {
157 for (i = 0; i < 1000; i++) {
158 if (i)
159 udelay(5);
160
161 if (!ath9k_hw_numtxpending(ah, q))
162 break;
163 }
164 }
165
166 REG_CLR_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
167 REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
168 REG_CLR_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
169
170 REG_WRITE(ah, AR_Q_TXD, 0);
171 }
172 EXPORT_SYMBOL(ath9k_hw_abort_tx_dma);
173
ath9k_hw_stop_dma_queue(struct ath_hw * ah,u32 q)174 bool ath9k_hw_stop_dma_queue(struct ath_hw *ah, u32 q)
175 {
176 #define ATH9K_TX_STOP_DMA_TIMEOUT 1000 /* usec */
177 #define ATH9K_TIME_QUANTUM 100 /* usec */
178 int wait_time = ATH9K_TX_STOP_DMA_TIMEOUT / ATH9K_TIME_QUANTUM;
179 int wait;
180
181 REG_WRITE(ah, AR_Q_TXD, 1 << q);
182
183 for (wait = wait_time; wait != 0; wait--) {
184 if (wait != wait_time)
185 udelay(ATH9K_TIME_QUANTUM);
186
187 if (ath9k_hw_numtxpending(ah, q) == 0)
188 break;
189 }
190
191 REG_WRITE(ah, AR_Q_TXD, 0);
192
193 return wait != 0;
194
195 #undef ATH9K_TX_STOP_DMA_TIMEOUT
196 #undef ATH9K_TIME_QUANTUM
197 }
198 EXPORT_SYMBOL(ath9k_hw_stop_dma_queue);
199
ath9k_hw_gettxintrtxqs(struct ath_hw * ah,u32 * txqs)200 void ath9k_hw_gettxintrtxqs(struct ath_hw *ah, u32 *txqs)
201 {
202 *txqs &= ah->intr_txqs;
203 ah->intr_txqs &= ~(*txqs);
204 }
205 EXPORT_SYMBOL(ath9k_hw_gettxintrtxqs);
206
ath9k_hw_set_txq_props(struct ath_hw * ah,int q,const struct ath9k_tx_queue_info * qinfo)207 bool ath9k_hw_set_txq_props(struct ath_hw *ah, int q,
208 const struct ath9k_tx_queue_info *qinfo)
209 {
210 u32 cw;
211 struct ath_common *common = ath9k_hw_common(ah);
212 struct ath9k_hw_capabilities *pCap = &ah->caps;
213 struct ath9k_tx_queue_info *qi;
214
215 if (q >= pCap->total_queues) {
216 ath_dbg(common, ATH_DBG_QUEUE,
217 "Set TXQ properties, invalid queue: %u\n", q);
218 return false;
219 }
220
221 qi = &ah->txq[q];
222 if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
223 ath_dbg(common, ATH_DBG_QUEUE,
224 "Set TXQ properties, inactive queue: %u\n", q);
225 return false;
226 }
227
228 ath_dbg(common, ATH_DBG_QUEUE, "Set queue properties for: %u\n", q);
229
230 qi->tqi_ver = qinfo->tqi_ver;
231 qi->tqi_subtype = qinfo->tqi_subtype;
232 qi->tqi_qflags = qinfo->tqi_qflags;
233 qi->tqi_priority = qinfo->tqi_priority;
234 if (qinfo->tqi_aifs != ATH9K_TXQ_USEDEFAULT)
235 qi->tqi_aifs = min(qinfo->tqi_aifs, 255U);
236 else
237 qi->tqi_aifs = INIT_AIFS;
238 if (qinfo->tqi_cwmin != ATH9K_TXQ_USEDEFAULT) {
239 cw = min(qinfo->tqi_cwmin, 1024U);
240 qi->tqi_cwmin = 1;
241 while (qi->tqi_cwmin < cw)
242 qi->tqi_cwmin = (qi->tqi_cwmin << 1) | 1;
243 } else
244 qi->tqi_cwmin = qinfo->tqi_cwmin;
245 if (qinfo->tqi_cwmax != ATH9K_TXQ_USEDEFAULT) {
246 cw = min(qinfo->tqi_cwmax, 1024U);
247 qi->tqi_cwmax = 1;
248 while (qi->tqi_cwmax < cw)
249 qi->tqi_cwmax = (qi->tqi_cwmax << 1) | 1;
250 } else
251 qi->tqi_cwmax = INIT_CWMAX;
252
253 if (qinfo->tqi_shretry != 0)
254 qi->tqi_shretry = min((u32) qinfo->tqi_shretry, 15U);
255 else
256 qi->tqi_shretry = INIT_SH_RETRY;
257 if (qinfo->tqi_lgretry != 0)
258 qi->tqi_lgretry = min((u32) qinfo->tqi_lgretry, 15U);
259 else
260 qi->tqi_lgretry = INIT_LG_RETRY;
261 qi->tqi_cbrPeriod = qinfo->tqi_cbrPeriod;
262 qi->tqi_cbrOverflowLimit = qinfo->tqi_cbrOverflowLimit;
263 qi->tqi_burstTime = qinfo->tqi_burstTime;
264 qi->tqi_readyTime = qinfo->tqi_readyTime;
265
266 switch (qinfo->tqi_subtype) {
267 case ATH9K_WME_UPSD:
268 if (qi->tqi_type == ATH9K_TX_QUEUE_DATA)
269 qi->tqi_intFlags = ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS;
270 break;
271 default:
272 break;
273 }
274
275 return true;
276 }
277 EXPORT_SYMBOL(ath9k_hw_set_txq_props);
278
ath9k_hw_get_txq_props(struct ath_hw * ah,int q,struct ath9k_tx_queue_info * qinfo)279 bool ath9k_hw_get_txq_props(struct ath_hw *ah, int q,
280 struct ath9k_tx_queue_info *qinfo)
281 {
282 struct ath_common *common = ath9k_hw_common(ah);
283 struct ath9k_hw_capabilities *pCap = &ah->caps;
284 struct ath9k_tx_queue_info *qi;
285
286 if (q >= pCap->total_queues) {
287 ath_dbg(common, ATH_DBG_QUEUE,
288 "Get TXQ properties, invalid queue: %u\n", q);
289 return false;
290 }
291
292 qi = &ah->txq[q];
293 if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
294 ath_dbg(common, ATH_DBG_QUEUE,
295 "Get TXQ properties, inactive queue: %u\n", q);
296 return false;
297 }
298
299 qinfo->tqi_qflags = qi->tqi_qflags;
300 qinfo->tqi_ver = qi->tqi_ver;
301 qinfo->tqi_subtype = qi->tqi_subtype;
302 qinfo->tqi_qflags = qi->tqi_qflags;
303 qinfo->tqi_priority = qi->tqi_priority;
304 qinfo->tqi_aifs = qi->tqi_aifs;
305 qinfo->tqi_cwmin = qi->tqi_cwmin;
306 qinfo->tqi_cwmax = qi->tqi_cwmax;
307 qinfo->tqi_shretry = qi->tqi_shretry;
308 qinfo->tqi_lgretry = qi->tqi_lgretry;
309 qinfo->tqi_cbrPeriod = qi->tqi_cbrPeriod;
310 qinfo->tqi_cbrOverflowLimit = qi->tqi_cbrOverflowLimit;
311 qinfo->tqi_burstTime = qi->tqi_burstTime;
312 qinfo->tqi_readyTime = qi->tqi_readyTime;
313
314 return true;
315 }
316 EXPORT_SYMBOL(ath9k_hw_get_txq_props);
317
ath9k_hw_setuptxqueue(struct ath_hw * ah,enum ath9k_tx_queue type,const struct ath9k_tx_queue_info * qinfo)318 int ath9k_hw_setuptxqueue(struct ath_hw *ah, enum ath9k_tx_queue type,
319 const struct ath9k_tx_queue_info *qinfo)
320 {
321 struct ath_common *common = ath9k_hw_common(ah);
322 struct ath9k_tx_queue_info *qi;
323 struct ath9k_hw_capabilities *pCap = &ah->caps;
324 int q;
325
326 switch (type) {
327 case ATH9K_TX_QUEUE_BEACON:
328 q = pCap->total_queues - 1;
329 break;
330 case ATH9K_TX_QUEUE_CAB:
331 q = pCap->total_queues - 2;
332 break;
333 case ATH9K_TX_QUEUE_PSPOLL:
334 q = 1;
335 break;
336 case ATH9K_TX_QUEUE_UAPSD:
337 q = pCap->total_queues - 3;
338 break;
339 case ATH9K_TX_QUEUE_DATA:
340 for (q = 0; q < pCap->total_queues; q++)
341 if (ah->txq[q].tqi_type ==
342 ATH9K_TX_QUEUE_INACTIVE)
343 break;
344 if (q == pCap->total_queues) {
345 ath_err(common, "No available TX queue\n");
346 return -1;
347 }
348 break;
349 default:
350 ath_err(common, "Invalid TX queue type: %u\n", type);
351 return -1;
352 }
353
354 ath_dbg(common, ATH_DBG_QUEUE, "Setup TX queue: %u\n", q);
355
356 qi = &ah->txq[q];
357 if (qi->tqi_type != ATH9K_TX_QUEUE_INACTIVE) {
358 ath_err(common, "TX queue: %u already active\n", q);
359 return -1;
360 }
361 memset(qi, 0, sizeof(struct ath9k_tx_queue_info));
362 qi->tqi_type = type;
363 if (qinfo == NULL) {
364 qi->tqi_qflags =
365 TXQ_FLAG_TXOKINT_ENABLE
366 | TXQ_FLAG_TXERRINT_ENABLE
367 | TXQ_FLAG_TXDESCINT_ENABLE | TXQ_FLAG_TXURNINT_ENABLE;
368 qi->tqi_aifs = INIT_AIFS;
369 qi->tqi_cwmin = ATH9K_TXQ_USEDEFAULT;
370 qi->tqi_cwmax = INIT_CWMAX;
371 qi->tqi_shretry = INIT_SH_RETRY;
372 qi->tqi_lgretry = INIT_LG_RETRY;
373 qi->tqi_physCompBuf = 0;
374 } else {
375 qi->tqi_physCompBuf = qinfo->tqi_physCompBuf;
376 (void) ath9k_hw_set_txq_props(ah, q, qinfo);
377 }
378
379 return q;
380 }
381 EXPORT_SYMBOL(ath9k_hw_setuptxqueue);
382
ath9k_hw_releasetxqueue(struct ath_hw * ah,u32 q)383 bool ath9k_hw_releasetxqueue(struct ath_hw *ah, u32 q)
384 {
385 struct ath9k_hw_capabilities *pCap = &ah->caps;
386 struct ath_common *common = ath9k_hw_common(ah);
387 struct ath9k_tx_queue_info *qi;
388
389 if (q >= pCap->total_queues) {
390 ath_dbg(common, ATH_DBG_QUEUE,
391 "Release TXQ, invalid queue: %u\n", q);
392 return false;
393 }
394 qi = &ah->txq[q];
395 if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
396 ath_dbg(common, ATH_DBG_QUEUE,
397 "Release TXQ, inactive queue: %u\n", q);
398 return false;
399 }
400
401 ath_dbg(common, ATH_DBG_QUEUE, "Release TX queue: %u\n", q);
402
403 qi->tqi_type = ATH9K_TX_QUEUE_INACTIVE;
404 ah->txok_interrupt_mask &= ~(1 << q);
405 ah->txerr_interrupt_mask &= ~(1 << q);
406 ah->txdesc_interrupt_mask &= ~(1 << q);
407 ah->txeol_interrupt_mask &= ~(1 << q);
408 ah->txurn_interrupt_mask &= ~(1 << q);
409 ath9k_hw_set_txq_interrupts(ah, qi);
410
411 return true;
412 }
413 EXPORT_SYMBOL(ath9k_hw_releasetxqueue);
414
ath9k_hw_resettxqueue(struct ath_hw * ah,u32 q)415 bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
416 {
417 struct ath9k_hw_capabilities *pCap = &ah->caps;
418 struct ath_common *common = ath9k_hw_common(ah);
419 struct ath9k_channel *chan = ah->curchan;
420 struct ath9k_tx_queue_info *qi;
421 u32 cwMin, chanCwMin, value;
422
423 if (q >= pCap->total_queues) {
424 ath_dbg(common, ATH_DBG_QUEUE,
425 "Reset TXQ, invalid queue: %u\n", q);
426 return false;
427 }
428
429 qi = &ah->txq[q];
430 if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
431 ath_dbg(common, ATH_DBG_QUEUE,
432 "Reset TXQ, inactive queue: %u\n", q);
433 return true;
434 }
435
436 ath_dbg(common, ATH_DBG_QUEUE, "Reset TX queue: %u\n", q);
437
438 if (qi->tqi_cwmin == ATH9K_TXQ_USEDEFAULT) {
439 if (chan && IS_CHAN_B(chan))
440 chanCwMin = INIT_CWMIN_11B;
441 else
442 chanCwMin = INIT_CWMIN;
443
444 for (cwMin = 1; cwMin < chanCwMin; cwMin = (cwMin << 1) | 1);
445 } else
446 cwMin = qi->tqi_cwmin;
447
448 ENABLE_REGWRITE_BUFFER(ah);
449
450 REG_WRITE(ah, AR_DLCL_IFS(q),
451 SM(cwMin, AR_D_LCL_IFS_CWMIN) |
452 SM(qi->tqi_cwmax, AR_D_LCL_IFS_CWMAX) |
453 SM(qi->tqi_aifs, AR_D_LCL_IFS_AIFS));
454
455 REG_WRITE(ah, AR_DRETRY_LIMIT(q),
456 SM(INIT_SSH_RETRY, AR_D_RETRY_LIMIT_STA_SH) |
457 SM(INIT_SLG_RETRY, AR_D_RETRY_LIMIT_STA_LG) |
458 SM(qi->tqi_shretry, AR_D_RETRY_LIMIT_FR_SH));
459
460 REG_WRITE(ah, AR_QMISC(q), AR_Q_MISC_DCU_EARLY_TERM_REQ);
461 REG_WRITE(ah, AR_DMISC(q),
462 AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x2);
463
464 if (qi->tqi_cbrPeriod) {
465 REG_WRITE(ah, AR_QCBRCFG(q),
466 SM(qi->tqi_cbrPeriod, AR_Q_CBRCFG_INTERVAL) |
467 SM(qi->tqi_cbrOverflowLimit, AR_Q_CBRCFG_OVF_THRESH));
468 REG_WRITE(ah, AR_QMISC(q),
469 REG_READ(ah, AR_QMISC(q)) | AR_Q_MISC_FSP_CBR |
470 (qi->tqi_cbrOverflowLimit ?
471 AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
472 }
473 if (qi->tqi_readyTime && (qi->tqi_type != ATH9K_TX_QUEUE_CAB)) {
474 REG_WRITE(ah, AR_QRDYTIMECFG(q),
475 SM(qi->tqi_readyTime, AR_Q_RDYTIMECFG_DURATION) |
476 AR_Q_RDYTIMECFG_EN);
477 }
478
479 REG_WRITE(ah, AR_DCHNTIME(q),
480 SM(qi->tqi_burstTime, AR_D_CHNTIME_DUR) |
481 (qi->tqi_burstTime ? AR_D_CHNTIME_EN : 0));
482
483 if (qi->tqi_burstTime
484 && (qi->tqi_qflags & TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)) {
485 REG_WRITE(ah, AR_QMISC(q),
486 REG_READ(ah, AR_QMISC(q)) |
487 AR_Q_MISC_RDYTIME_EXP_POLICY);
488
489 }
490
491 if (qi->tqi_qflags & TXQ_FLAG_BACKOFF_DISABLE) {
492 REG_WRITE(ah, AR_DMISC(q),
493 REG_READ(ah, AR_DMISC(q)) |
494 AR_D_MISC_POST_FR_BKOFF_DIS);
495 }
496
497 REGWRITE_BUFFER_FLUSH(ah);
498
499 if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE) {
500 REG_WRITE(ah, AR_DMISC(q),
501 REG_READ(ah, AR_DMISC(q)) |
502 AR_D_MISC_FRAG_BKOFF_EN);
503 }
504 switch (qi->tqi_type) {
505 case ATH9K_TX_QUEUE_BEACON:
506 ENABLE_REGWRITE_BUFFER(ah);
507
508 REG_WRITE(ah, AR_QMISC(q), REG_READ(ah, AR_QMISC(q))
509 | AR_Q_MISC_FSP_DBA_GATED
510 | AR_Q_MISC_BEACON_USE
511 | AR_Q_MISC_CBR_INCR_DIS1);
512
513 REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q))
514 | (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
515 AR_D_MISC_ARB_LOCKOUT_CNTRL_S)
516 | AR_D_MISC_BEACON_USE
517 | AR_D_MISC_POST_FR_BKOFF_DIS);
518
519 REGWRITE_BUFFER_FLUSH(ah);
520
521 /*
522 * cwmin and cwmax should be 0 for beacon queue
523 * but not for IBSS as we would create an imbalance
524 * on beaconing fairness for participating nodes.
525 */
526 if (AR_SREV_9300_20_OR_LATER(ah) &&
527 ah->opmode != NL80211_IFTYPE_ADHOC) {
528 REG_WRITE(ah, AR_DLCL_IFS(q), SM(0, AR_D_LCL_IFS_CWMIN)
529 | SM(0, AR_D_LCL_IFS_CWMAX)
530 | SM(qi->tqi_aifs, AR_D_LCL_IFS_AIFS));
531 }
532 break;
533 case ATH9K_TX_QUEUE_CAB:
534 ENABLE_REGWRITE_BUFFER(ah);
535
536 REG_WRITE(ah, AR_QMISC(q), REG_READ(ah, AR_QMISC(q))
537 | AR_Q_MISC_FSP_DBA_GATED
538 | AR_Q_MISC_CBR_INCR_DIS1
539 | AR_Q_MISC_CBR_INCR_DIS0);
540 value = (qi->tqi_readyTime -
541 (ah->config.sw_beacon_response_time -
542 ah->config.dma_beacon_response_time) -
543 ah->config.additional_swba_backoff) * 1024;
544 REG_WRITE(ah, AR_QRDYTIMECFG(q),
545 value | AR_Q_RDYTIMECFG_EN);
546 REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q))
547 | (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
548 AR_D_MISC_ARB_LOCKOUT_CNTRL_S));
549
550 REGWRITE_BUFFER_FLUSH(ah);
551
552 break;
553 case ATH9K_TX_QUEUE_PSPOLL:
554 REG_WRITE(ah, AR_QMISC(q),
555 REG_READ(ah, AR_QMISC(q)) | AR_Q_MISC_CBR_INCR_DIS1);
556 break;
557 case ATH9K_TX_QUEUE_UAPSD:
558 REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q)) |
559 AR_D_MISC_POST_FR_BKOFF_DIS);
560 break;
561 default:
562 break;
563 }
564
565 if (qi->tqi_intFlags & ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS) {
566 REG_WRITE(ah, AR_DMISC(q),
567 REG_READ(ah, AR_DMISC(q)) |
568 SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,
569 AR_D_MISC_ARB_LOCKOUT_CNTRL) |
570 AR_D_MISC_POST_FR_BKOFF_DIS);
571 }
572
573 if (AR_SREV_9300_20_OR_LATER(ah))
574 REG_WRITE(ah, AR_Q_DESC_CRCCHK, AR_Q_DESC_CRCCHK_EN);
575
576 if (qi->tqi_qflags & TXQ_FLAG_TXOKINT_ENABLE)
577 ah->txok_interrupt_mask |= 1 << q;
578 else
579 ah->txok_interrupt_mask &= ~(1 << q);
580 if (qi->tqi_qflags & TXQ_FLAG_TXERRINT_ENABLE)
581 ah->txerr_interrupt_mask |= 1 << q;
582 else
583 ah->txerr_interrupt_mask &= ~(1 << q);
584 if (qi->tqi_qflags & TXQ_FLAG_TXDESCINT_ENABLE)
585 ah->txdesc_interrupt_mask |= 1 << q;
586 else
587 ah->txdesc_interrupt_mask &= ~(1 << q);
588 if (qi->tqi_qflags & TXQ_FLAG_TXEOLINT_ENABLE)
589 ah->txeol_interrupt_mask |= 1 << q;
590 else
591 ah->txeol_interrupt_mask &= ~(1 << q);
592 if (qi->tqi_qflags & TXQ_FLAG_TXURNINT_ENABLE)
593 ah->txurn_interrupt_mask |= 1 << q;
594 else
595 ah->txurn_interrupt_mask &= ~(1 << q);
596 ath9k_hw_set_txq_interrupts(ah, qi);
597
598 return true;
599 }
600 EXPORT_SYMBOL(ath9k_hw_resettxqueue);
601
ath9k_hw_rxprocdesc(struct ath_hw * ah,struct ath_desc * ds,struct ath_rx_status * rs,u64 tsf)602 int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
603 struct ath_rx_status *rs, u64 tsf)
604 {
605 struct ar5416_desc ads;
606 struct ar5416_desc *adsp = AR5416DESC(ds);
607 u32 phyerr;
608
609 if ((adsp->ds_rxstatus8 & AR_RxDone) == 0)
610 return -EINPROGRESS;
611
612 ads.u.rx = adsp->u.rx;
613
614 rs->rs_status = 0;
615 rs->rs_flags = 0;
616
617 rs->rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
618 rs->rs_tstamp = ads.AR_RcvTimestamp;
619
620 if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
621 rs->rs_rssi = ATH9K_RSSI_BAD;
622 rs->rs_rssi_ctl0 = ATH9K_RSSI_BAD;
623 rs->rs_rssi_ctl1 = ATH9K_RSSI_BAD;
624 rs->rs_rssi_ctl2 = ATH9K_RSSI_BAD;
625 rs->rs_rssi_ext0 = ATH9K_RSSI_BAD;
626 rs->rs_rssi_ext1 = ATH9K_RSSI_BAD;
627 rs->rs_rssi_ext2 = ATH9K_RSSI_BAD;
628 } else {
629 rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
630 rs->rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
631 AR_RxRSSIAnt00);
632 rs->rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
633 AR_RxRSSIAnt01);
634 rs->rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
635 AR_RxRSSIAnt02);
636 rs->rs_rssi_ext0 = MS(ads.ds_rxstatus4,
637 AR_RxRSSIAnt10);
638 rs->rs_rssi_ext1 = MS(ads.ds_rxstatus4,
639 AR_RxRSSIAnt11);
640 rs->rs_rssi_ext2 = MS(ads.ds_rxstatus4,
641 AR_RxRSSIAnt12);
642 }
643 if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
644 rs->rs_keyix = MS(ads.ds_rxstatus8, AR_KeyIdx);
645 else
646 rs->rs_keyix = ATH9K_RXKEYIX_INVALID;
647
648 rs->rs_rate = RXSTATUS_RATE(ah, (&ads));
649 rs->rs_more = (ads.ds_rxstatus1 & AR_RxMore) ? 1 : 0;
650
651 rs->rs_isaggr = (ads.ds_rxstatus8 & AR_RxAggr) ? 1 : 0;
652 rs->rs_moreaggr =
653 (ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
654 rs->rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
655 rs->rs_flags =
656 (ads.ds_rxstatus3 & AR_GI) ? ATH9K_RX_GI : 0;
657 rs->rs_flags |=
658 (ads.ds_rxstatus3 & AR_2040) ? ATH9K_RX_2040 : 0;
659
660 if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
661 rs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
662 if (ads.ds_rxstatus8 & AR_PostDelimCRCErr)
663 rs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
664 if (ads.ds_rxstatus8 & AR_DecryptBusyErr)
665 rs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
666
667 if ((ads.ds_rxstatus8 & AR_RxFrameOK) == 0) {
668 /*
669 * Treat these errors as mutually exclusive to avoid spurious
670 * extra error reports from the hardware. If a CRC error is
671 * reported, then decryption and MIC errors are irrelevant,
672 * the frame is going to be dropped either way
673 */
674 if (ads.ds_rxstatus8 & AR_CRCErr)
675 rs->rs_status |= ATH9K_RXERR_CRC;
676 else if (ads.ds_rxstatus8 & AR_PHYErr) {
677 rs->rs_status |= ATH9K_RXERR_PHY;
678 phyerr = MS(ads.ds_rxstatus8, AR_PHYErrCode);
679 rs->rs_phyerr = phyerr;
680 } else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
681 rs->rs_status |= ATH9K_RXERR_DECRYPT;
682 else if (ads.ds_rxstatus8 & AR_MichaelErr)
683 rs->rs_status |= ATH9K_RXERR_MIC;
684
685 if (ads.ds_rxstatus8 & AR_KeyMiss)
686 rs->rs_status |= ATH9K_RXERR_DECRYPT;
687 }
688
689 return 0;
690 }
691 EXPORT_SYMBOL(ath9k_hw_rxprocdesc);
692
693 /*
694 * This can stop or re-enables RX.
695 *
696 * If bool is set this will kill any frame which is currently being
697 * transferred between the MAC and baseband and also prevent any new
698 * frames from getting started.
699 */
ath9k_hw_setrxabort(struct ath_hw * ah,bool set)700 bool ath9k_hw_setrxabort(struct ath_hw *ah, bool set)
701 {
702 u32 reg;
703
704 if (set) {
705 REG_SET_BIT(ah, AR_DIAG_SW,
706 (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
707
708 if (!ath9k_hw_wait(ah, AR_OBS_BUS_1, AR_OBS_BUS_1_RX_STATE,
709 0, AH_WAIT_TIMEOUT)) {
710 REG_CLR_BIT(ah, AR_DIAG_SW,
711 (AR_DIAG_RX_DIS |
712 AR_DIAG_RX_ABORT));
713
714 reg = REG_READ(ah, AR_OBS_BUS_1);
715 ath_err(ath9k_hw_common(ah),
716 "RX failed to go idle in 10 ms RXSM=0x%x\n",
717 reg);
718
719 return false;
720 }
721 } else {
722 REG_CLR_BIT(ah, AR_DIAG_SW,
723 (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
724 }
725
726 return true;
727 }
728 EXPORT_SYMBOL(ath9k_hw_setrxabort);
729
ath9k_hw_putrxbuf(struct ath_hw * ah,u32 rxdp)730 void ath9k_hw_putrxbuf(struct ath_hw *ah, u32 rxdp)
731 {
732 REG_WRITE(ah, AR_RXDP, rxdp);
733 }
734 EXPORT_SYMBOL(ath9k_hw_putrxbuf);
735
ath9k_hw_startpcureceive(struct ath_hw * ah,bool is_scanning)736 void ath9k_hw_startpcureceive(struct ath_hw *ah, bool is_scanning)
737 {
738 ath9k_enable_mib_counters(ah);
739
740 ath9k_ani_reset(ah, is_scanning);
741
742 REG_CLR_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
743 }
744 EXPORT_SYMBOL(ath9k_hw_startpcureceive);
745
ath9k_hw_abortpcurecv(struct ath_hw * ah)746 void ath9k_hw_abortpcurecv(struct ath_hw *ah)
747 {
748 REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_ABORT | AR_DIAG_RX_DIS);
749
750 ath9k_hw_disable_mib_counters(ah);
751 }
752 EXPORT_SYMBOL(ath9k_hw_abortpcurecv);
753
ath9k_hw_stopdmarecv(struct ath_hw * ah,bool * reset)754 bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
755 {
756 #define AH_RX_STOP_DMA_TIMEOUT 10000 /* usec */
757 #define AH_RX_TIME_QUANTUM 100 /* usec */
758 struct ath_common *common = ath9k_hw_common(ah);
759 u32 mac_status, last_mac_status = 0;
760 int i;
761
762 /* Enable access to the DMA observation bus */
763 REG_WRITE(ah, AR_MACMISC,
764 ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
765 (AR_MACMISC_MISC_OBS_BUS_1 <<
766 AR_MACMISC_MISC_OBS_BUS_MSB_S)));
767
768 REG_WRITE(ah, AR_CR, AR_CR_RXD);
769
770 /* Wait for rx enable bit to go low */
771 for (i = AH_RX_STOP_DMA_TIMEOUT / AH_TIME_QUANTUM; i != 0; i--) {
772 if ((REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
773 break;
774
775 if (!AR_SREV_9300_20_OR_LATER(ah)) {
776 mac_status = REG_READ(ah, AR_DMADBG_7) & 0x7f0;
777 if (mac_status == 0x1c0 && mac_status == last_mac_status) {
778 *reset = true;
779 break;
780 }
781
782 last_mac_status = mac_status;
783 }
784
785 udelay(AH_TIME_QUANTUM);
786 }
787
788 if (i == 0) {
789 ath_err(common,
790 "DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
791 AH_RX_STOP_DMA_TIMEOUT / 1000,
792 REG_READ(ah, AR_CR),
793 REG_READ(ah, AR_DIAG_SW),
794 REG_READ(ah, AR_DMADBG_7));
795 return false;
796 } else {
797 return true;
798 }
799
800 #undef AH_RX_TIME_QUANTUM
801 #undef AH_RX_STOP_DMA_TIMEOUT
802 }
803 EXPORT_SYMBOL(ath9k_hw_stopdmarecv);
804
ath9k_hw_beaconq_setup(struct ath_hw * ah)805 int ath9k_hw_beaconq_setup(struct ath_hw *ah)
806 {
807 struct ath9k_tx_queue_info qi;
808
809 memset(&qi, 0, sizeof(qi));
810 qi.tqi_aifs = 1;
811 qi.tqi_cwmin = 0;
812 qi.tqi_cwmax = 0;
813 /* NB: don't enable any interrupts */
814 return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
815 }
816 EXPORT_SYMBOL(ath9k_hw_beaconq_setup);
817
ath9k_hw_intrpend(struct ath_hw * ah)818 bool ath9k_hw_intrpend(struct ath_hw *ah)
819 {
820 u32 host_isr;
821
822 if (AR_SREV_9100(ah))
823 return true;
824
825 host_isr = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
826 if ((host_isr & AR_INTR_MAC_IRQ) && (host_isr != AR_INTR_SPURIOUS))
827 return true;
828
829 host_isr = REG_READ(ah, AR_INTR_SYNC_CAUSE);
830 if ((host_isr & AR_INTR_SYNC_DEFAULT)
831 && (host_isr != AR_INTR_SPURIOUS))
832 return true;
833
834 return false;
835 }
836 EXPORT_SYMBOL(ath9k_hw_intrpend);
837
ath9k_hw_disable_interrupts(struct ath_hw * ah)838 void ath9k_hw_disable_interrupts(struct ath_hw *ah)
839 {
840 struct ath_common *common = ath9k_hw_common(ah);
841
842 ath_dbg(common, ATH_DBG_INTERRUPT, "disable IER\n");
843 REG_WRITE(ah, AR_IER, AR_IER_DISABLE);
844 (void) REG_READ(ah, AR_IER);
845 if (!AR_SREV_9100(ah)) {
846 REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, 0);
847 (void) REG_READ(ah, AR_INTR_ASYNC_ENABLE);
848
849 REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0);
850 (void) REG_READ(ah, AR_INTR_SYNC_ENABLE);
851 }
852 }
853 EXPORT_SYMBOL(ath9k_hw_disable_interrupts);
854
ath9k_hw_enable_interrupts(struct ath_hw * ah)855 void ath9k_hw_enable_interrupts(struct ath_hw *ah)
856 {
857 struct ath_common *common = ath9k_hw_common(ah);
858
859 if (!(ah->imask & ATH9K_INT_GLOBAL))
860 return;
861
862 ath_dbg(common, ATH_DBG_INTERRUPT, "enable IER\n");
863 REG_WRITE(ah, AR_IER, AR_IER_ENABLE);
864 if (!AR_SREV_9100(ah)) {
865 REG_WRITE(ah, AR_INTR_ASYNC_ENABLE,
866 AR_INTR_MAC_IRQ);
867 REG_WRITE(ah, AR_INTR_ASYNC_MASK, AR_INTR_MAC_IRQ);
868
869
870 REG_WRITE(ah, AR_INTR_SYNC_ENABLE,
871 AR_INTR_SYNC_DEFAULT);
872 REG_WRITE(ah, AR_INTR_SYNC_MASK,
873 AR_INTR_SYNC_DEFAULT);
874 }
875 ath_dbg(common, ATH_DBG_INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
876 REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
877 }
878 EXPORT_SYMBOL(ath9k_hw_enable_interrupts);
879
ath9k_hw_set_interrupts(struct ath_hw * ah,enum ath9k_int ints)880 void ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
881 {
882 enum ath9k_int omask = ah->imask;
883 u32 mask, mask2;
884 struct ath9k_hw_capabilities *pCap = &ah->caps;
885 struct ath_common *common = ath9k_hw_common(ah);
886
887 if (!(ints & ATH9K_INT_GLOBAL))
888 ath9k_hw_disable_interrupts(ah);
889
890 ath_dbg(common, ATH_DBG_INTERRUPT, "0x%x => 0x%x\n", omask, ints);
891
892 /* TODO: global int Ref count */
893 mask = ints & ATH9K_INT_COMMON;
894 mask2 = 0;
895
896 if (ints & ATH9K_INT_TX) {
897 if (ah->config.tx_intr_mitigation)
898 mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM;
899 else {
900 if (ah->txok_interrupt_mask)
901 mask |= AR_IMR_TXOK;
902 if (ah->txdesc_interrupt_mask)
903 mask |= AR_IMR_TXDESC;
904 }
905 if (ah->txerr_interrupt_mask)
906 mask |= AR_IMR_TXERR;
907 if (ah->txeol_interrupt_mask)
908 mask |= AR_IMR_TXEOL;
909 }
910 if (ints & ATH9K_INT_RX) {
911 if (AR_SREV_9300_20_OR_LATER(ah)) {
912 mask |= AR_IMR_RXERR | AR_IMR_RXOK_HP;
913 if (ah->config.rx_intr_mitigation) {
914 mask &= ~AR_IMR_RXOK_LP;
915 mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
916 } else {
917 mask |= AR_IMR_RXOK_LP;
918 }
919 } else {
920 if (ah->config.rx_intr_mitigation)
921 mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
922 else
923 mask |= AR_IMR_RXOK | AR_IMR_RXDESC;
924 }
925 if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
926 mask |= AR_IMR_GENTMR;
927 }
928
929 if (ints & (ATH9K_INT_BMISC)) {
930 mask |= AR_IMR_BCNMISC;
931 if (ints & ATH9K_INT_TIM)
932 mask2 |= AR_IMR_S2_TIM;
933 if (ints & ATH9K_INT_DTIM)
934 mask2 |= AR_IMR_S2_DTIM;
935 if (ints & ATH9K_INT_DTIMSYNC)
936 mask2 |= AR_IMR_S2_DTIMSYNC;
937 if (ints & ATH9K_INT_CABEND)
938 mask2 |= AR_IMR_S2_CABEND;
939 if (ints & ATH9K_INT_TSFOOR)
940 mask2 |= AR_IMR_S2_TSFOOR;
941 }
942
943 if (ints & (ATH9K_INT_GTT | ATH9K_INT_CST)) {
944 mask |= AR_IMR_BCNMISC;
945 if (ints & ATH9K_INT_GTT)
946 mask2 |= AR_IMR_S2_GTT;
947 if (ints & ATH9K_INT_CST)
948 mask2 |= AR_IMR_S2_CST;
949 }
950
951 ath_dbg(common, ATH_DBG_INTERRUPT, "new IMR 0x%x\n", mask);
952 REG_WRITE(ah, AR_IMR, mask);
953 ah->imrs2_reg &= ~(AR_IMR_S2_TIM | AR_IMR_S2_DTIM | AR_IMR_S2_DTIMSYNC |
954 AR_IMR_S2_CABEND | AR_IMR_S2_CABTO |
955 AR_IMR_S2_TSFOOR | AR_IMR_S2_GTT | AR_IMR_S2_CST);
956 ah->imrs2_reg |= mask2;
957 REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
958
959 if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
960 if (ints & ATH9K_INT_TIM_TIMER)
961 REG_SET_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
962 else
963 REG_CLR_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
964 }
965
966 if (ints & ATH9K_INT_GLOBAL)
967 ath9k_hw_enable_interrupts(ah);
968
969 return;
970 }
971 EXPORT_SYMBOL(ath9k_hw_set_interrupts);
972