1 /* 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * Copyright (c) 2002-2008 Atheros Communications, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 * 17 * $Id: ar5416_interrupts.c,v 1.3 2011/11/28 00:30:17 jmcneill Exp $ 18 */ 19 #include "opt_ah.h" 20 21 #include "ah.h" 22 #include "ah_internal.h" 23 24 #include "ar5416/ar5416.h" 25 #include "ar5416/ar5416reg.h" 26 27 /* 28 * Checks to see if an interrupt is pending on our NIC 29 * 30 * Returns: TRUE if an interrupt is pending 31 * FALSE if not 32 */ 33 HAL_BOOL 34 ar5416IsInterruptPending(struct ath_hal *ah) 35 { 36 uint32_t isr; 37 /* 38 * Some platforms trigger our ISR before applying power to 39 * the card, so make sure the INTPEND is really 1, not 0xffffffff. 40 */ 41 isr = OS_REG_READ(ah, AR_INTR_ASYNC_CAUSE); 42 if (isr != AR_INTR_SPURIOUS && (isr & AR_INTR_MAC_IRQ) != 0) 43 return AH_TRUE; 44 45 isr = OS_REG_READ(ah, AR_INTR_SYNC_CAUSE); 46 if (isr != AR_INTR_SPURIOUS && (isr & AR_INTR_SYNC_DEFAULT)) 47 return AH_TRUE; 48 49 return AH_FALSE; 50 } 51 52 /* 53 * Reads the Interrupt Status Register value from the NIC, thus deasserting 54 * the interrupt line, and returns both the masked and unmasked mapped ISR 55 * values. The value returned is mapped to abstract the hw-specific bit 56 * locations in the Interrupt Status Register. 57 * 58 * (*masked) is cleared on initial call. 59 * 60 * Returns: A hardware-abstracted bitmap of all non-masked-out 61 * interrupts pending, as well as an unmasked value 62 */ 63 HAL_BOOL 64 ar5416GetPendingInterrupts(struct ath_hal *ah, HAL_INT *masked) 65 { 66 uint32_t isr, isr0, isr1, sync_cause; 67 68 /* 69 * Verify there's a mac interrupt and the RTC is on. 70 */ 71 if ((OS_REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) && 72 (OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M) == AR_RTC_STATUS_ON) 73 isr = OS_REG_READ(ah, AR_ISR); 74 else 75 isr = 0; 76 sync_cause = OS_REG_READ(ah, AR_INTR_SYNC_CAUSE); 77 sync_cause &= AR_INTR_SYNC_DEFAULT; 78 *masked = 0; 79 if (isr == 0 && sync_cause == 0) 80 return AH_FALSE; 81 82 if (isr != 0) { 83 struct ath_hal_5212 *ahp = AH5212(ah); 84 uint32_t mask2; 85 86 mask2 = 0; 87 if (isr & AR_ISR_BCNMISC) { 88 uint32_t isr2 = OS_REG_READ(ah, AR_ISR_S2); 89 if (isr2 & AR_ISR_S2_TIM) 90 mask2 |= HAL_INT_TIM; 91 if (isr2 & AR_ISR_S2_DTIM) 92 mask2 |= HAL_INT_DTIM; 93 if (isr2 & AR_ISR_S2_DTIMSYNC) 94 mask2 |= HAL_INT_DTIMSYNC; 95 if (isr2 & (AR_ISR_S2_CABEND )) 96 mask2 |= HAL_INT_CABEND; 97 if (isr2 & AR_ISR_S2_GTT) 98 mask2 |= HAL_INT_GTT; 99 if (isr2 & AR_ISR_S2_CST) 100 mask2 |= HAL_INT_CST; 101 if (isr2 & AR_ISR_S2_TSFOOR) 102 mask2 |= HAL_INT_TSFOOR; 103 } 104 105 isr = OS_REG_READ(ah, AR_ISR_RAC); 106 if (isr == 0xffffffff) { 107 *masked = 0; 108 return AH_FALSE; 109 } 110 111 *masked = isr & HAL_INT_COMMON; 112 if (isr & (AR_ISR_RXOK | AR_ISR_RXERR)) 113 *masked |= HAL_INT_RX; 114 if (isr & (AR_ISR_TXOK | AR_ISR_TXDESC | AR_ISR_TXERR | AR_ISR_TXEOL)) { 115 *masked |= HAL_INT_TX; 116 isr0 = OS_REG_READ(ah, AR_ISR_S0_S); 117 ahp->ah_intrTxqs |= MS(isr0, AR_ISR_S0_QCU_TXOK); 118 ahp->ah_intrTxqs |= MS(isr0, AR_ISR_S0_QCU_TXDESC); 119 isr1 = OS_REG_READ(ah, AR_ISR_S1_S); 120 ahp->ah_intrTxqs |= MS(isr1, AR_ISR_S1_QCU_TXERR); 121 ahp->ah_intrTxqs |= MS(isr1, AR_ISR_S1_QCU_TXEOL); 122 } 123 124 if (AR_SREV_MERLIN(ah) || AR_SREV_KITE(ah)) { 125 uint32_t isr5; 126 isr5 = OS_REG_READ(ah, AR_ISR_S5_S); 127 if (isr5 & AR_ISR_S5_TIM_TIMER) 128 *masked |= HAL_INT_TIM_TIMER; 129 } 130 131 /* Interrupt Mitigation on AR5416 */ 132 #ifdef AR5416_INT_MITIGATION 133 if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM)) 134 *masked |= HAL_INT_RX; 135 if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM)) 136 *masked |= HAL_INT_TX; 137 #endif 138 *masked |= mask2; 139 } 140 if (sync_cause != 0) { 141 if (sync_cause & (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR)) { 142 *masked |= HAL_INT_FATAL; 143 } 144 if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) { 145 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: RADM CPL timeout\n", 146 __func__); 147 OS_REG_WRITE(ah, AR_RC, AR_RC_HOSTIF); 148 OS_REG_WRITE(ah, AR_RC, 0); 149 *masked |= HAL_INT_FATAL; 150 } 151 /* 152 * On fatal errors collect ISR state for debugging. 153 */ 154 if (*masked & HAL_INT_FATAL) { 155 AH_PRIVATE(ah)->ah_fatalState[0] = isr; 156 AH_PRIVATE(ah)->ah_fatalState[1] = sync_cause; 157 HALDEBUG(ah, HAL_DEBUG_ANY, 158 "%s: fatal error, ISR_RAC 0x%x SYNC_CAUSE 0x%x\n", 159 __func__, isr, sync_cause); 160 } 161 162 OS_REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause); 163 /* NB: flush write */ 164 (void) OS_REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR); 165 } 166 return AH_TRUE; 167 } 168 169 /* 170 * Atomically enables NIC interrupts. Interrupts are passed in 171 * via the enumerated bitmask in ints. 172 */ 173 HAL_INT 174 ar5416SetInterrupts(struct ath_hal *ah, HAL_INT ints) 175 { 176 struct ath_hal_5212 *ahp = AH5212(ah); 177 uint32_t omask = ahp->ah_maskReg; 178 uint32_t mask, mask2; 179 180 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: 0x%x => 0x%x\n", 181 __func__, omask, ints); 182 183 if (omask & HAL_INT_GLOBAL) { 184 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: disable IER\n", __func__); 185 OS_REG_WRITE(ah, AR_IER, AR_IER_DISABLE); 186 (void) OS_REG_READ(ah, AR_IER); 187 188 OS_REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, 0); 189 (void) OS_REG_READ(ah, AR_INTR_ASYNC_ENABLE); 190 191 OS_REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0); 192 (void) OS_REG_READ(ah, AR_INTR_SYNC_ENABLE); 193 } 194 195 mask = ints & HAL_INT_COMMON; 196 mask2 = 0; 197 198 if (ints & HAL_INT_TX) { 199 if (ahp->ah_txOkInterruptMask) 200 mask |= AR_IMR_TXOK; 201 if (ahp->ah_txErrInterruptMask) 202 mask |= AR_IMR_TXERR; 203 if (ahp->ah_txDescInterruptMask) 204 mask |= AR_IMR_TXDESC; 205 if (ahp->ah_txEolInterruptMask) 206 mask |= AR_IMR_TXEOL; 207 } 208 if (ints & HAL_INT_RX) 209 mask |= AR_IMR_RXOK | AR_IMR_RXERR | AR_IMR_RXDESC; 210 #ifdef AR5416_INT_MITIGATION 211 /* 212 * Overwrite default mask if Interrupt mitigation 213 * is specified for AR5416 214 */ 215 mask = ints & HAL_INT_COMMON; 216 if (ints & HAL_INT_TX) 217 mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM; 218 if (ints & HAL_INT_RX) 219 mask |= AR_IMR_RXERR | AR_IMR_RXMINTR | AR_IMR_RXINTM; 220 #endif 221 if (ints & (HAL_INT_BMISC)) { 222 mask |= AR_IMR_BCNMISC; 223 if (ints & HAL_INT_TIM) 224 mask2 |= AR_IMR_S2_TIM; 225 if (ints & HAL_INT_DTIM) 226 mask2 |= AR_IMR_S2_DTIM; 227 if (ints & HAL_INT_DTIMSYNC) 228 mask2 |= AR_IMR_S2_DTIMSYNC; 229 if (ints & HAL_INT_CABEND) 230 mask2 |= (AR_IMR_S2_CABEND ); 231 if (ints & HAL_INT_GTT) 232 mask2 |= AR_IMR_S2_GTT; 233 if (ints & HAL_INT_CST) 234 mask2 |= AR_IMR_S2_CST; 235 if (ints & HAL_INT_TSFOOR) 236 mask2 |= AR_IMR_S2_TSFOOR; 237 } 238 239 /* Write the new IMR and store off our SW copy. */ 240 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: new IMR 0x%x\n", __func__, mask); 241 OS_REG_WRITE(ah, AR_IMR, mask); 242 mask = OS_REG_READ(ah, AR_IMR_S2) & ~(AR_IMR_S2_TIM | 243 AR_IMR_S2_DTIM | 244 AR_IMR_S2_DTIMSYNC | 245 AR_IMR_S2_CABEND | 246 AR_IMR_S2_CABTO | 247 AR_IMR_S2_TSFOOR | 248 AR_IMR_S2_GTT | 249 AR_IMR_S2_CST); 250 OS_REG_WRITE(ah, AR_IMR_S2, mask | mask2); 251 252 ahp->ah_maskReg = ints; 253 254 /* Re-enable interrupts if they were enabled before. */ 255 if (ints & HAL_INT_GLOBAL) { 256 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: enable IER\n", __func__); 257 OS_REG_WRITE(ah, AR_IER, AR_IER_ENABLE); 258 259 OS_REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, AR_INTR_MAC_IRQ); 260 OS_REG_WRITE(ah, AR_INTR_ASYNC_MASK, AR_INTR_MAC_IRQ); 261 262 OS_REG_WRITE(ah, AR_INTR_SYNC_ENABLE, AR_INTR_SYNC_DEFAULT); 263 OS_REG_WRITE(ah, AR_INTR_SYNC_MASK, AR_INTR_SYNC_DEFAULT); 264 } 265 266 return omask; 267 } 268
Indexes created Tue Sep 23 01:09:51 GMT 2025