FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/ath/ath_hal/ar9300/ar9300_recv_ds.c

     /*
      * Copyright (c) 2013 Qualcomm Atheros, Inc.
      *
      * Permission to use, copy, modify, and/or distribute this software for any
      * purpose with or without fee is hereby granted, provided that the above
      * copyright notice and this permission notice appear in all copies.
      *
      * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
      * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
     * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
     * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
     * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
     * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
     * PERFORMANCE OF THIS SOFTWARE.
     */
    
    #include "opt_ah.h"
    
    #include "ah.h"
    #include "ah_desc.h"
    #include "ah_internal.h"
    
    #include "ar9300/ar9300.h"
    #include "ar9300/ar9300reg.h"
    #include "ar9300/ar9300desc.h"
    
    
    /*
     * Process an RX descriptor, and return the status to the caller.
     * Copy some hardware specific items into the software portion
     * of the descriptor.
     *
     * NB: the caller is responsible for validating the memory contents
     *     of the descriptor (e.g. flushing any cached copy).
     */
    HAL_STATUS
    ar9300_proc_rx_desc_fast(struct ath_hal *ah, struct ath_desc *ds,
        u_int32_t pa, struct ath_desc *nds, struct ath_rx_status *rxs,
        void *buf_addr)
    {
        struct ar9300_rxs *rxsp = AR9300RXS(buf_addr);
    
        /*
        ath_hal_printf(ah,"CHH=RX: ds_info 0x%x  status1: 0x%x  status11: 0x%x\n",
                            rxsp->ds_info,rxsp->status1,rxsp->status11);
         */
    
        if ((rxsp->status11 & AR_rx_done) == 0) {
            return HAL_EINPROGRESS;
        }
    
        if (MS(rxsp->ds_info, AR_desc_id) != 0x168c) {
    #if __PKT_SERIOUS_ERRORS__
           /*BUG: 63564-HT */
            HALDEBUG(AH_NULL, HAL_DEBUG_UNMASKABLE, "%s: Rx Descriptor error 0x%x\n",
                     __func__, rxsp->ds_info);
    #endif
            return HAL_EINVAL;
        }
    
        if ((rxsp->ds_info & (AR_tx_rx_desc | AR_ctrl_stat)) != 0) {
    #if __PKT_SERIOUS_ERRORS__
            HALDEBUG(AH_NULL, HAL_DEBUG_UNMASKABLE,
                "%s: Rx Descriptor wrong info 0x%x\n", __func__, rxsp->ds_info);
    #endif
            return HAL_EINPROGRESS;
        }
    
        rxs->rs_status = 0;
        rxs->rs_flags =  0;
        rxs->rs_phyerr = 0;
    
        rxs->rs_datalen = rxsp->status2 & AR_data_len;
        rxs->rs_tstamp =  rxsp->status3;
    
        /* XXX what about key_cache_miss? */
        rxs->rs_rssi = MS(rxsp->status5, AR_rx_rssi_combined);
        rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_rx_rssi_ant00);
        rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_rx_rssi_ant01);
        rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_rx_rssi_ant02);
        rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_rx_rssi_ant10);
        rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_rx_rssi_ant11);
        rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_rx_rssi_ant12);
        if (rxsp->status11 & AR_rx_key_idx_valid) {
            rxs->rs_keyix = MS(rxsp->status11, AR_key_idx);
        } else {
            rxs->rs_keyix = HAL_RXKEYIX_INVALID;
        }
        /* NB: caller expected to do rate table mapping */
        rxs->rs_rate = MS(rxsp->status1, AR_rx_rate);
        rxs->rs_more = (rxsp->status2 & AR_rx_more) ? 1 : 0;
    
        rxs->rs_isaggr = (rxsp->status11 & AR_rx_aggr) ? 1 : 0;
        rxs->rs_moreaggr = (rxsp->status11 & AR_rx_more_aggr) ? 1 : 0;
        rxs->rs_antenna = (MS(rxsp->status4, AR_rx_antenna) & 0x7);
        rxs->rs_flags = (rxsp->status11 & AR_apsd_trig) ? HAL_RX_IS_APSD : 0;
        rxs->rs_flags |= (rxsp->status4 & AR_gi) ? HAL_RX_GI : 0;
        rxs->rs_flags |= (rxsp->status4 & AR_2040) ? HAL_RX_2040 : 0;
    
       /* TX beamforming; CSI for locationing */
       rxs->rs_flags |= (rxsp->status2 & AR_hw_upload_data) ? HAL_RX_HW_UPLOAD_DATA : 0;
       rxs->rs_flags |= (rxsp->status4 & AR_rx_not_sounding) ? 0 : HAL_RX_HW_SOUNDING;
       rxs->rs_ness = MS(rxsp->status4, AR_rx_ness);
       rxs->rs_flags |= (rxsp->status4 & AR_hw_upload_data_valid) ? HAL_RX_UPLOAD_VALID : 0;
       rxs->rs_hw_upload_data_type = MS(rxsp->status11, AR_hw_upload_data_type);
   
       /* Copy EVM information */
       rxs->rs_evm0 = rxsp->status6;
       rxs->rs_evm1 = rxsp->status7;
       rxs->rs_evm2 = rxsp->status8;
       rxs->rs_evm3 = rxsp->status9;
       rxs->rs_evm4 = (rxsp->status10 & 0xffff);
   
       if (rxsp->status11 & AR_pre_delim_crc_err) {
           rxs->rs_flags |= HAL_RX_DELIM_CRC_PRE;
       }
       if (rxsp->status11 & AR_post_delim_crc_err) {
           rxs->rs_flags |= HAL_RX_DELIM_CRC_POST;
       }
       if (rxsp->status11 & AR_decrypt_busy_err) {
           rxs->rs_flags |= HAL_RX_DECRYPT_BUSY;
       }
       if (rxsp->status11 & AR_hi_rx_chain) {
           rxs->rs_flags |= HAL_RX_HI_RX_CHAIN;
       }
       if (rxsp->status11 & AR_key_miss) {
           rxs->rs_status |= HAL_RXERR_KEYMISS;
       }
   
       if ((rxsp->status11 & AR_rx_frame_ok) == 0) {
           /*
            * These four bits should not be set together.  The
            * 9300 spec states a Michael error can only occur if
            * decrypt_crc_err not set (and TKIP is used).  Experience
            * indicates however that you can also get Michael errors
            * when a CRC error is detected, but these are specious.
            * Consequently we filter them out here so we don't
            * confuse and/or complicate drivers.
            */
   
           if (rxsp->status11 & AR_crc_err) {
               rxs->rs_status |= HAL_RXERR_CRC;
               /*
                * ignore CRC flag for phy reports
                */
               if (rxsp->status11 & AR_phyerr) {
                   u_int phyerr = MS(rxsp->status11, AR_phy_err_code);
                   rxs->rs_status |= HAL_RXERR_PHY;
                   rxs->rs_phyerr = phyerr;
               }
           } else if (rxsp->status11 & AR_phyerr) {
               u_int phyerr;
   
               /*
                * Packets with OFDM_RESTART on post delimiter are CRC OK and
                * usable and MAC ACKs them.
                * To avoid packet from being lost, we remove the PHY Err flag
                * so that lmac layer does not drop them.
                * (EV 70071)
                */
               phyerr = MS(rxsp->status11, AR_phy_err_code);
               if ((phyerr == HAL_PHYERR_OFDM_RESTART) && 
                       (rxsp->status11 & AR_post_delim_crc_err)) {
                   rxs->rs_phyerr = 0;
               } else {
                   rxs->rs_status |= HAL_RXERR_PHY;
                   rxs->rs_phyerr = phyerr;
               }
           } else if (rxsp->status11 & AR_decrypt_crc_err) {
               rxs->rs_status |= HAL_RXERR_DECRYPT;
           } else if (rxsp->status11 & AR_michael_err) {
               rxs->rs_status |= HAL_RXERR_MIC;
           }
       } else {
           if (rxsp->status11 & AR_position_bit) {
   #if 1
               rxs->rs_flags |= HAL_RX_LOC_INFO;
   #else
               /*
                * If the locationing counter is enabled, Osprey always
                * seems to put AR_position_bit in each frame.
                * So, only do this if we also have a valid upload
                * and it's type "1" (which I'm guessing is CSI.)
                */
               if ((rxs->rs_flags & HAL_RX_UPLOAD_VALID) &&
                   (rxs->rs_hw_upload_data_type == 1)) {
                       rxs->rs_flags |= HAL_RX_LOC_INFO;
               }
   #endif
           }
       }
   #if 0
       rxs->rs_channel = AH_PRIVATE(ah)->ah_curchan->channel;
   #endif
       return HAL_OK;
   }
   
   HAL_STATUS
   ar9300_proc_rx_desc(struct ath_hal *ah, struct ath_desc *ds,
       u_int32_t pa, struct ath_desc *nds, u_int64_t tsf, 
       struct ath_rx_status *rxs)
   {
       return HAL_ENOTSUPP;
   }
   
   /*
    * rx path in ISR is different for ar9300 from ar5416, and
    * ath_rx_proc_descfast will not be called if edmasupport is true.
    * So this function ath_hal_get_rxkeyidx will not be 
    * called for ar9300.
    * This function in ar9300's HAL is just a stub one because we need 
    * to link something to the callback interface of the HAL module.
    */
   HAL_STATUS
   ar9300_get_rx_key_idx(struct ath_hal *ah, struct ath_desc *ds, u_int8_t *keyix,
       u_int8_t *status)
   {
       *status = 0;
       *keyix = HAL_RXKEYIX_INVALID;    
       return HAL_ENOTSUPP;
   }

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