drivers/net/wireless/ath/ath9k/mac.c

   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
  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
  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
  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
  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
  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
  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  */
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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  */
 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
 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
 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
 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
 754 bool ath9k_hw_stopdmarecv(struct ath_hw *ah)
 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         int i;
 760
 761         REG_WRITE(ah, AR_CR, AR_CR_RXD);
 762
 763         /* Wait for rx enable bit to go low */
 764         for (i = AH_RX_STOP_DMA_TIMEOUT / AH_TIME_QUANTUM; i != 0; i--) {
 765                 if ((REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
 766                         break;
 767                 udelay(AH_TIME_QUANTUM);
 768         }
 769
 770         if (i == 0) {
 771                 ath_err(common,
 772                         "DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x\n",
 773                         AH_RX_STOP_DMA_TIMEOUT / 1000,
 774                         REG_READ(ah, AR_CR),
 775                         REG_READ(ah, AR_DIAG_SW));
 776                 return false;
 777         } else {
 778                 return true;
 779         }
 780
 781 #undef AH_RX_TIME_QUANTUM
 782 #undef AH_RX_STOP_DMA_TIMEOUT
 783 }
 784 EXPORT_SYMBOL(ath9k_hw_stopdmarecv);
 785
 786 int ath9k_hw_beaconq_setup(struct ath_hw *ah)
 787 {
 788         struct ath9k_tx_queue_info qi;
 789
 790         memset(&qi, 0, sizeof(qi));
 791         qi.tqi_aifs = 1;
 792         qi.tqi_cwmin = 0;
 793         qi.tqi_cwmax = 0;
 794         /* NB: don't enable any interrupts */
 795         return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
 796 }
 797 EXPORT_SYMBOL(ath9k_hw_beaconq_setup);
 798
 799 bool ath9k_hw_intrpend(struct ath_hw *ah)
 800 {
 801         u32 host_isr;
 802
 803         if (AR_SREV_9100(ah))
 804                 return true;
 805
 806         host_isr = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
 807         if ((host_isr & AR_INTR_MAC_IRQ) && (host_isr != AR_INTR_SPURIOUS))
 808                 return true;
 809
 810         host_isr = REG_READ(ah, AR_INTR_SYNC_CAUSE);
 811         if ((host_isr & AR_INTR_SYNC_DEFAULT)
 812             && (host_isr != AR_INTR_SPURIOUS))
 813                 return true;
 814
 815         return false;
 816 }
 817 EXPORT_SYMBOL(ath9k_hw_intrpend);
 818
 819 void ath9k_hw_disable_interrupts(struct ath_hw *ah)
 820 {
 821         struct ath_common *common = ath9k_hw_common(ah);
 822
 823         ath_dbg(common, ATH_DBG_INTERRUPT, "disable IER\n");
 824         REG_WRITE(ah, AR_IER, AR_IER_DISABLE);
 825         (void) REG_READ(ah, AR_IER);
 826         if (!AR_SREV_9100(ah)) {
 827                 REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, 0);
 828                 (void) REG_READ(ah, AR_INTR_ASYNC_ENABLE);
 829
 830                 REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0);
 831                 (void) REG_READ(ah, AR_INTR_SYNC_ENABLE);
 832         }
 833 }
 834 EXPORT_SYMBOL(ath9k_hw_disable_interrupts);
 835
 836 void ath9k_hw_enable_interrupts(struct ath_hw *ah)
 837 {
 838         struct ath_common *common = ath9k_hw_common(ah);
 839
 840         if (!(ah->imask & ATH9K_INT_GLOBAL))
 841                 return;
 842
 843         ath_dbg(common, ATH_DBG_INTERRUPT, "enable IER\n");
 844         REG_WRITE(ah, AR_IER, AR_IER_ENABLE);
 845         if (!AR_SREV_9100(ah)) {
 846                 REG_WRITE(ah, AR_INTR_ASYNC_ENABLE,
 847                           AR_INTR_MAC_IRQ);
 848                 REG_WRITE(ah, AR_INTR_ASYNC_MASK, AR_INTR_MAC_IRQ);
 849
 850
 851                 REG_WRITE(ah, AR_INTR_SYNC_ENABLE,
 852                           AR_INTR_SYNC_DEFAULT);
 853                 REG_WRITE(ah, AR_INTR_SYNC_MASK,
 854                           AR_INTR_SYNC_DEFAULT);
 855         }
 856         ath_dbg(common, ATH_DBG_INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
 857                 REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
 858 }
 859 EXPORT_SYMBOL(ath9k_hw_enable_interrupts);
 860
 861 void ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
 862 {
 863         enum ath9k_int omask = ah->imask;
 864         u32 mask, mask2;
 865         struct ath9k_hw_capabilities *pCap = &ah->caps;
 866         struct ath_common *common = ath9k_hw_common(ah);
 867
 868         if (!(ints & ATH9K_INT_GLOBAL))
 869                 ath9k_hw_disable_interrupts(ah);
 870
 871         ath_dbg(common, ATH_DBG_INTERRUPT, "0x%x => 0x%x\n", omask, ints);
 872
 873         /* TODO: global int Ref count */
 874         mask = ints & ATH9K_INT_COMMON;
 875         mask2 = 0;
 876
 877         if (ints & ATH9K_INT_TX) {
 878                 if (ah->config.tx_intr_mitigation)
 879                         mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM;
 880                 else {
 881                         if (ah->txok_interrupt_mask)
 882                                 mask |= AR_IMR_TXOK;
 883                         if (ah->txdesc_interrupt_mask)
 884                                 mask |= AR_IMR_TXDESC;
 885                 }
 886                 if (ah->txerr_interrupt_mask)
 887                         mask |= AR_IMR_TXERR;
 888                 if (ah->txeol_interrupt_mask)
 889                         mask |= AR_IMR_TXEOL;
 890         }
 891         if (ints & ATH9K_INT_RX) {
 892                 if (AR_SREV_9300_20_OR_LATER(ah)) {
 893                         mask |= AR_IMR_RXERR | AR_IMR_RXOK_HP;
 894                         if (ah->config.rx_intr_mitigation) {
 895                                 mask &= ~AR_IMR_RXOK_LP;
 896                                 mask |=  AR_IMR_RXMINTR | AR_IMR_RXINTM;
 897                         } else {
 898                                 mask |= AR_IMR_RXOK_LP;
 899                         }
 900                 } else {
 901                         if (ah->config.rx_intr_mitigation)
 902                                 mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
 903                         else
 904                                 mask |= AR_IMR_RXOK | AR_IMR_RXDESC;
 905                 }
 906                 if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 907                         mask |= AR_IMR_GENTMR;
 908         }
 909
 910         if (ints & (ATH9K_INT_BMISC)) {
 911                 mask |= AR_IMR_BCNMISC;
 912                 if (ints & ATH9K_INT_TIM)
 913                         mask2 |= AR_IMR_S2_TIM;
 914                 if (ints & ATH9K_INT_DTIM)
 915                         mask2 |= AR_IMR_S2_DTIM;
 916                 if (ints & ATH9K_INT_DTIMSYNC)
 917                         mask2 |= AR_IMR_S2_DTIMSYNC;
 918                 if (ints & ATH9K_INT_CABEND)
 919                         mask2 |= AR_IMR_S2_CABEND;
 920                 if (ints & ATH9K_INT_TSFOOR)
 921                         mask2 |= AR_IMR_S2_TSFOOR;
 922         }
 923
 924         if (ints & (ATH9K_INT_GTT | ATH9K_INT_CST)) {
 925                 mask |= AR_IMR_BCNMISC;
 926                 if (ints & ATH9K_INT_GTT)
 927                         mask2 |= AR_IMR_S2_GTT;
 928                 if (ints & ATH9K_INT_CST)
 929                         mask2 |= AR_IMR_S2_CST;
 930         }
 931
 932         ath_dbg(common, ATH_DBG_INTERRUPT, "new IMR 0x%x\n", mask);
 933         REG_WRITE(ah, AR_IMR, mask);
 934         ah->imrs2_reg &= ~(AR_IMR_S2_TIM | AR_IMR_S2_DTIM | AR_IMR_S2_DTIMSYNC |
 935                            AR_IMR_S2_CABEND | AR_IMR_S2_CABTO |
 936                            AR_IMR_S2_TSFOOR | AR_IMR_S2_GTT | AR_IMR_S2_CST);
 937         ah->imrs2_reg |= mask2;
 938         REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
 939
 940         if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
 941                 if (ints & ATH9K_INT_TIM_TIMER)
 942                         REG_SET_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
 943                 else
 944                         REG_CLR_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
 945         }
 946
 947         if (ints & ATH9K_INT_GLOBAL)
 948                 ath9k_hw_enable_interrupts(ah);
 949
 950         return;
 951 }
 952 EXPORT_SYMBOL(ath9k_hw_set_interrupts);