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qcacmn: fix incorrect radiotap rssi for monitor frame

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For lithium based chip, the rssi_comb value fetched from monitor
buffer TLV is in unit dBm already, if plus noise_floor value in
qdf_nbuf_update_radiotap() again, then the rssi showed in wireshark
will be incorrect.

Convert rssi_comb to unit dB and not impact legacy chip in
qdf_nbuf_update_radiotap().

Change-Id: I889a15f39ebc639386405fb0aae1909c0cce75e0
CRs-Fixed: 2844896
This commit is contained in:
Jinwei Chen 2020-12-30 00:05:21 -08:00 • committed by snandini
commit ef24abebc8
1 changed files with 24 additions and 1 deletions
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25
dp/wifi3.0/dp_rx_mon_dest.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
* Copyright (c) 2017-2021 The Linux Foundation. All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
@ -1411,6 +1411,27 @@ qdf_nbuf_t dp_rx_mon_restitch_mpdu(struct dp_soc *soc, uint32_t mac_id,
}
#endif
#ifdef DP_MON_RSSI_IN_DBM
/*
* dp_rx_mon_rssi_convert(): convert rssi_comb from unit dBm to dB
* to match with radiotap further conversion requirement
* @rx_status: monitor mode rx status pointer
*
* Return: none
*/
static inline
void dp_rx_mon_rssi_convert(struct mon_rx_status *rx_status)
{
rx_status->rssi_comb = rx_status->rssi_comb -
rx_status->chan_noise_floor;
}
#else
static inline
void dp_rx_mon_rssi_convert(struct mon_rx_status *rx_status)
{
}
#endif
/*
* dp_rx_mon_deliver(): function to deliver packets to stack
* @soc: DP soc
@ -1448,6 +1469,8 @@ QDF_STATUS dp_rx_mon_deliver(struct dp_soc *soc, uint32_t mac_id,
pdev->ppdu_info.rx_status.device_id = soc->device_id;
pdev->ppdu_info.rx_status.chan_noise_floor =
pdev->chan_noise_floor;
/* convert rssi_comb from dBm to positive dB value */
dp_rx_mon_rssi_convert(&pdev->ppdu_info.rx_status);
dp_handle_tx_capture(soc, pdev, mon_mpdu);