diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath5k/qcu.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/qcu.c | 99 |
1 files changed, 51 insertions, 48 deletions
diff --git a/drivers/net/wireless/ath/ath5k/qcu.c b/drivers/net/wireless/ath/ath5k/qcu.c index 4186ff4c6e9c..84c717ded1c5 100644 --- a/drivers/net/wireless/ath/ath5k/qcu.c +++ b/drivers/net/wireless/ath/ath5k/qcu.c @@ -36,24 +36,58 @@ int ath5k_hw_get_tx_queueprops(struct ath5k_hw *ah, int queue, } /* + * Make sure cw is a power of 2 minus 1 and smaller than 1024 + */ +static u16 ath5k_cw_validate(u16 cw_req) +{ + u32 cw = 1; + cw_req = min(cw_req, (u16)1023); + + while (cw < cw_req) + cw = (cw << 1) | 1; + + return cw; +} + +/* * Set properties for a transmit queue */ int ath5k_hw_set_tx_queueprops(struct ath5k_hw *ah, int queue, - const struct ath5k_txq_info *queue_info) + const struct ath5k_txq_info *qinfo) { + struct ath5k_txq_info *qi; + AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num); - if (ah->ah_txq[queue].tqi_type == AR5K_TX_QUEUE_INACTIVE) + qi = &ah->ah_txq[queue]; + + if (qi->tqi_type == AR5K_TX_QUEUE_INACTIVE) return -EIO; - memcpy(&ah->ah_txq[queue], queue_info, sizeof(struct ath5k_txq_info)); + /* copy and validate values */ + qi->tqi_type = qinfo->tqi_type; + qi->tqi_subtype = qinfo->tqi_subtype; + qi->tqi_flags = qinfo->tqi_flags; + /* + * According to the docs: Although the AIFS field is 8 bit wide, + * the maximum supported value is 0xFC. Setting it higher than that + * will cause the DCU to hang. + */ + qi->tqi_aifs = min(qinfo->tqi_aifs, (u8)0xFC); + qi->tqi_cw_min = ath5k_cw_validate(qinfo->tqi_cw_min); + qi->tqi_cw_max = ath5k_cw_validate(qinfo->tqi_cw_max); + qi->tqi_cbr_period = qinfo->tqi_cbr_period; + qi->tqi_cbr_overflow_limit = qinfo->tqi_cbr_overflow_limit; + qi->tqi_burst_time = qinfo->tqi_burst_time; + qi->tqi_ready_time = qinfo->tqi_ready_time; /*XXX: Is this supported on 5210 ?*/ - if ((queue_info->tqi_type == AR5K_TX_QUEUE_DATA && - ((queue_info->tqi_subtype == AR5K_WME_AC_VI) || - (queue_info->tqi_subtype == AR5K_WME_AC_VO))) || - queue_info->tqi_type == AR5K_TX_QUEUE_UAPSD) - ah->ah_txq[queue].tqi_flags |= AR5K_TXQ_FLAG_POST_FR_BKOFF_DIS; + /*XXX: Is this correct for AR5K_WME_AC_VI,VO ???*/ + if ((qinfo->tqi_type == AR5K_TX_QUEUE_DATA && + ((qinfo->tqi_subtype == AR5K_WME_AC_VI) || + (qinfo->tqi_subtype == AR5K_WME_AC_VO))) || + qinfo->tqi_type == AR5K_TX_QUEUE_UAPSD) + qi->tqi_flags |= AR5K_TXQ_FLAG_POST_FR_BKOFF_DIS; return 0; } @@ -186,7 +220,7 @@ void ath5k_hw_release_tx_queue(struct ath5k_hw *ah, unsigned int queue) */ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) { - u32 cw_min, cw_max, retry_lg, retry_sh; + u32 retry_lg, retry_sh; struct ath5k_txq_info *tq = &ah->ah_txq[queue]; AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num); @@ -217,14 +251,13 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) /* Set IFS0 */ if (ah->ah_turbo) { ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS_TURBO + - (ah->ah_aifs + tq->tqi_aifs) * - AR5K_INIT_SLOT_TIME_TURBO) << + tq->tqi_aifs * AR5K_INIT_SLOT_TIME_TURBO) << AR5K_IFS0_DIFS_S) | AR5K_INIT_SIFS_TURBO, AR5K_IFS0); } else { ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS + - (ah->ah_aifs + tq->tqi_aifs) * - AR5K_INIT_SLOT_TIME) << AR5K_IFS0_DIFS_S) | + tq->tqi_aifs * AR5K_INIT_SLOT_TIME) << + AR5K_IFS0_DIFS_S) | AR5K_INIT_SIFS, AR5K_IFS0); } @@ -248,35 +281,6 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) } /* - * Calculate cwmin/max by channel mode - */ - cw_min = ah->ah_cw_min = AR5K_TUNE_CWMIN; - cw_max = ah->ah_cw_max = AR5K_TUNE_CWMAX; - ah->ah_aifs = AR5K_TUNE_AIFS; - /*XR is only supported on 5212*/ - if (IS_CHAN_XR(ah->ah_current_channel) && - ah->ah_version == AR5K_AR5212) { - cw_min = ah->ah_cw_min = AR5K_TUNE_CWMIN_XR; - cw_max = ah->ah_cw_max = AR5K_TUNE_CWMAX_XR; - ah->ah_aifs = AR5K_TUNE_AIFS_XR; - /*B mode is not supported on 5210*/ - } else if (IS_CHAN_B(ah->ah_current_channel) && - ah->ah_version != AR5K_AR5210) { - cw_min = ah->ah_cw_min = AR5K_TUNE_CWMIN_11B; - cw_max = ah->ah_cw_max = AR5K_TUNE_CWMAX_11B; - ah->ah_aifs = AR5K_TUNE_AIFS_11B; - } - - cw_min = 1; - while (cw_min < ah->ah_cw_min) - cw_min = (cw_min << 1) | 1; - - cw_min = tq->tqi_cw_min < 0 ? (cw_min >> (-tq->tqi_cw_min)) : - ((cw_min << tq->tqi_cw_min) + (1 << tq->tqi_cw_min) - 1); - cw_max = tq->tqi_cw_max < 0 ? (cw_max >> (-tq->tqi_cw_max)) : - ((cw_max << tq->tqi_cw_max) + (1 << tq->tqi_cw_max) - 1); - - /* * Calculate and set retry limits */ if (ah->ah_software_retry) { @@ -292,7 +296,7 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) /*No QCU/DCU [5210]*/ if (ah->ah_version == AR5K_AR5210) { ath5k_hw_reg_write(ah, - (cw_min << AR5K_NODCU_RETRY_LMT_CW_MIN_S) + (tq->tqi_cw_min << AR5K_NODCU_RETRY_LMT_CW_MIN_S) | AR5K_REG_SM(AR5K_INIT_SLG_RETRY, AR5K_NODCU_RETRY_LMT_SLG_RETRY) | AR5K_REG_SM(AR5K_INIT_SSH_RETRY, @@ -314,14 +318,13 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) /*===Rest is also for QCU/DCU only [5211+]===*/ /* - * Set initial content window (cw_min/cw_max) + * Set contention window (cw_min/cw_max) * and arbitrated interframe space (aifs)... */ ath5k_hw_reg_write(ah, - AR5K_REG_SM(cw_min, AR5K_DCU_LCL_IFS_CW_MIN) | - AR5K_REG_SM(cw_max, AR5K_DCU_LCL_IFS_CW_MAX) | - AR5K_REG_SM(ah->ah_aifs + tq->tqi_aifs, - AR5K_DCU_LCL_IFS_AIFS), + AR5K_REG_SM(tq->tqi_cw_min, AR5K_DCU_LCL_IFS_CW_MIN) | + AR5K_REG_SM(tq->tqi_cw_max, AR5K_DCU_LCL_IFS_CW_MAX) | + AR5K_REG_SM(tq->tqi_aifs, AR5K_DCU_LCL_IFS_AIFS), AR5K_QUEUE_DFS_LOCAL_IFS(queue)); /* |