1 /* 2 * Copyright (c) 2013 Qualcomm Atheros, 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 WITH 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 13 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14 * PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "opt_ah.h" 18 19 #include "ah.h" 20 #include "ah_desc.h" 21 #include "ah_internal.h" 22 23 #include "ar9300/ar9300.h" 24 #include "ar9300/ar9300reg.h" 25 #include "ar9300/ar9300desc.h" 26 27 28 /* 29 * Process an RX descriptor, and return the status to the caller. 30 * Copy some hardware specific items into the software portion 31 * of the descriptor. 32 * 33 * NB: the caller is responsible for validating the memory contents 34 * of the descriptor (e.g. flushing any cached copy). 35 */ 36 HAL_STATUS 37 ar9300_proc_rx_desc_fast(struct ath_hal *ah, struct ath_desc *ds, 38 u_int32_t pa, struct ath_desc *nds, struct ath_rx_status *rxs, 39 void *buf_addr) 40 { 41 struct ar9300_rxs *rxsp = AR9300RXS(buf_addr); 42 43 /* 44 ath_hal_printf(ah,"CHH=RX: ds_info 0x%x status1: 0x%x status11: 0x%x\n", 45 rxsp->ds_info,rxsp->status1,rxsp->status11); 46 */ 47 48 if ((rxsp->status11 & AR_rx_done) == 0) { 49 return HAL_EINPROGRESS; 50 } 51 52 if (MS(rxsp->ds_info, AR_desc_id) != 0x168c) { 53 #if __PKT_SERIOUS_ERRORS__ 54 /*BUG: 63564-HT */ 55 HALDEBUG(AH_NULL, HAL_DEBUG_UNMASKABLE, "%s: Rx Descriptor error 0x%x\n", 56 __func__, rxsp->ds_info); 57 #endif 58 return HAL_EINVAL; 59 } 60 61 if ((rxsp->ds_info & (AR_tx_rx_desc | AR_ctrl_stat)) != 0) { 62 #if __PKT_SERIOUS_ERRORS__ 63 HALDEBUG(AH_NULL, HAL_DEBUG_UNMASKABLE, 64 "%s: Rx Descriptor wrong info 0x%x\n", __func__, rxsp->ds_info); 65 #endif 66 return HAL_EINPROGRESS; 67 } 68 69 rxs->rs_status = 0; 70 rxs->rs_flags = 0; 71 rxs->rs_phyerr = 0; 72 73 rxs->rs_datalen = rxsp->status2 & AR_data_len; 74 rxs->rs_tstamp = rxsp->status3; 75 76 /* XXX what about key_cache_miss? */ 77 rxs->rs_rssi = MS(rxsp->status5, AR_rx_rssi_combined); 78 rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_rx_rssi_ant00); 79 rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_rx_rssi_ant01); 80 rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_rx_rssi_ant02); 81 rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_rx_rssi_ant10); 82 rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_rx_rssi_ant11); 83 rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_rx_rssi_ant12); 84 if (rxsp->status11 & AR_rx_key_idx_valid) { 85 rxs->rs_keyix = MS(rxsp->status11, AR_key_idx); 86 } else { 87 rxs->rs_keyix = HAL_RXKEYIX_INVALID; 88 } 89 /* NB: caller expected to do rate table mapping */ 90 rxs->rs_rate = MS(rxsp->status1, AR_rx_rate); 91 rxs->rs_more = (rxsp->status2 & AR_rx_more) ? 1 : 0; 92 93 rxs->rs_isaggr = (rxsp->status11 & AR_rx_aggr) ? 1 : 0; 94 rxs->rs_moreaggr = (rxsp->status11 & AR_rx_more_aggr) ? 1 : 0; 95 rxs->rs_antenna = (MS(rxsp->status4, AR_rx_antenna) & 0x7); 96 rxs->rs_flags = (rxsp->status11 & AR_apsd_trig) ? HAL_RX_IS_APSD : 0; 97 rxs->rs_flags |= (rxsp->status4 & AR_gi) ? HAL_RX_GI : 0; 98 rxs->rs_flags |= (rxsp->status4 & AR_2040) ? HAL_RX_2040 : 0; 99 100 /* Copy EVM information */ 101 rxs->rs_evm0 = rxsp->status6; 102 rxs->rs_evm1 = rxsp->status7; 103 rxs->rs_evm2 = rxsp->status8; 104 rxs->rs_evm3 = rxsp->status9; 105 rxs->rs_evm4 = (rxsp->status10 & 0xffff); 106 107 if (rxsp->status11 & AR_pre_delim_crc_err) { 108 rxs->rs_flags |= HAL_RX_DELIM_CRC_PRE; 109 } 110 if (rxsp->status11 & AR_post_delim_crc_err) { 111 rxs->rs_flags |= HAL_RX_DELIM_CRC_POST; 112 } 113 if (rxsp->status11 & AR_decrypt_busy_err) { 114 rxs->rs_flags |= HAL_RX_DECRYPT_BUSY; 115 } 116 if (rxsp->status11 & AR_hi_rx_chain) { 117 rxs->rs_flags |= HAL_RX_HI_RX_CHAIN; 118 } 119 if (rxsp->status11 & AR_key_miss) { 120 rxs->rs_status |= HAL_RXERR_KEYMISS; 121 } 122 123 if ((rxsp->status11 & AR_rx_frame_ok) == 0) { 124 /* 125 * These four bits should not be set together. The 126 * 9300 spec states a Michael error can only occur if 127 * decrypt_crc_err not set (and TKIP is used). Experience 128 * indicates however that you can also get Michael errors 129 * when a CRC error is detected, but these are specious. 130 * Consequently we filter them out here so we don't 131 * confuse and/or complicate drivers. 132 */ 133 134 if (rxsp->status11 & AR_crc_err) { 135 rxs->rs_status |= HAL_RXERR_CRC; 136 /* 137 * ignore CRC flag for phy reports 138 */ 139 if (rxsp->status11 & AR_phyerr) { 140 u_int phyerr = MS(rxsp->status11, AR_phy_err_code); 141 rxs->rs_status |= HAL_RXERR_PHY; 142 rxs->rs_phyerr = phyerr; 143 } 144 } else if (rxsp->status11 & AR_phyerr) { 145 u_int phyerr; 146 147 /* 148 * Packets with OFDM_RESTART on post delimiter are CRC OK and 149 * usable and MAC ACKs them. 150 * To avoid packet from being lost, we remove the PHY Err flag 151 * so that lmac layer does not drop them. 152 * (EV 70071) 153 */ 154 phyerr = MS(rxsp->status11, AR_phy_err_code); 155 if ((phyerr == HAL_PHYERR_OFDM_RESTART) && 156 (rxsp->status11 & AR_post_delim_crc_err)) { 157 rxs->rs_phyerr = 0; 158 } else { 159 rxs->rs_status |= HAL_RXERR_PHY; 160 rxs->rs_phyerr = phyerr; 161 } 162 } else if (rxsp->status11 & AR_decrypt_crc_err) { 163 rxs->rs_status |= HAL_RXERR_DECRYPT; 164 } else if (rxsp->status11 & AR_michael_err) { 165 rxs->rs_status |= HAL_RXERR_MIC; 166 } 167 } 168 #if 0 169 rxs->rs_channel = AH_PRIVATE(ah)->ah_curchan->channel; 170 #endif 171 return HAL_OK; 172 } 173 174 HAL_STATUS 175 ar9300_proc_rx_desc(struct ath_hal *ah, struct ath_desc *ds, 176 u_int32_t pa, struct ath_desc *nds, u_int64_t tsf, 177 struct ath_rx_status *rxs) 178 { 179 return HAL_ENOTSUPP; 180 } 181 182 /* 183 * rx path in ISR is different for ar9300 from ar5416, and 184 * ath_rx_proc_descfast will not be called if edmasupport is true. 185 * So this function ath_hal_get_rxkeyidx will not be 186 * called for ar9300. 187 * This function in ar9300's HAL is just a stub one because we need 188 * to link something to the callback interface of the HAL module. 189 */ 190 HAL_STATUS 191 ar9300_get_rx_key_idx(struct ath_hal *ah, struct ath_desc *ds, u_int8_t *keyix, 192 u_int8_t *status) 193 { 194 *status = 0; 195 *keyix = HAL_RXKEYIX_INVALID; 196 return HAL_ENOTSUPP; 197 } 198