Commit 507a13f5 authored by Mordechay Goodstein's avatar Mordechay Goodstein Committed by Luca Coelho
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iwlwifi: rs: set RTS protection for all non legacy rates 



This helps with congested environments reducing the conflict cost to
RTS retries only, instead of the entire BA packet.

Signed-off-by: default avatarMordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200928121852.da97d87d7adf.If06301d4660b14e459195a15831b069b9f6c5e3c@changeid


Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
parent 9e3c3936

drivers/net/wireless/intel/iwlwifi/fw/api/rs.h

+9 −2
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ 
 *

 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.

 * Copyright(c) 2017 Intel Deutschland GmbH

 * Copyright(c) 2018 - 2019 Intel Corporation

 * Copyright(c) 2018 - 2020 Intel Corporation

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as
@@ -29,7 +29,7 @@ 
 *

 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.

 * Copyright(c) 2017 Intel Deutschland GmbH

 * Copyright(c) 2018 - 2019 Intel Corporation

 * Copyright(c) 2018 - 2020 Intel Corporation

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without
@@ -486,6 +486,13 @@ enum { 
#define RATE_MCS_HE_106T_POS		28

#define RATE_MCS_HE_106T_MSK		(1 << RATE_MCS_HE_106T_POS)



/* Bit 30-31: (1) RTS, (2) CTS */

#define RATE_MCS_RTS_REQUIRED_POS  (30)

#define RATE_MCS_RTS_REQUIRED_MSK  (0x1 << RATE_MCS_RTS_REQUIRED_POS)



#define RATE_MCS_CTS_REQUIRED_POS  (31)

#define RATE_MCS_CTS_REQUIRED_MSK  (0x1 << RATE_MCS_CTS_REQUIRED_POS)



/* Link Quality definitions */



/* # entries in rate scale table to support Tx retries */

drivers/net/wireless/intel/iwlwifi/mvm/rs.c

+6 −0
Original line number Diff line number Diff line
@@ -830,6 +830,12 @@ static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, 
		return ucode_rate;

	}



	/* set RTS protection for all non legacy rates

	 * This helps with congested environments reducing the conflict cost to

	 * RTS retries only, instead of the entire BA packet.

	 */

	ucode_rate |= RATE_MCS_RTS_REQUIRED_MSK;



	if (is_ht(rate)) {

		if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {

			IWL_ERR(mvm, "Invalid HT rate index %d\n", index);