[PATCH 08/11] brcmfmac: Make 5G join preference configurable.
From: Arend van Spriel <hidden>
Date: 2015-11-25 10:32:53
Subsystem:
broadcom brcm80211 ieee802.11 wireless drivers, the rest · Maintainers:
Arend van Spriel, Linus Torvalds
From: Hante Meuleman <redacted> By default the 5G band has an advantage of 8 dBm on the RSSI when it comes to selection during join and roam. This patch adds a module param to make this value configurable. Using the value 99 results in configuration that 5G has always preference over 2.4G. Reviewed-by: Arend Van Spriel <redacted> Reviewed-by: Franky (Zhenhui) Lin <redacted> Reviewed-by: Pieter-Paul Giesberts <redacted> Signed-off-by: Hante Meuleman <redacted> Signed-off-by: Arend van Spriel <redacted> --- .../wireless/broadcom/brcm80211/brcmfmac/common.c | 31 +++++++++++++++++----- 1 file changed, 25 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
index 474de11..6bc0ae9 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c@@ -15,6 +15,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include <linux/string.h> #include <linux/netdevice.h> #include <brcmu_wifi.h>
@@ -32,8 +33,18 @@ const u8 ALLFFMAC[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; #define BRCMF_DEFAULT_SCAN_CHANNEL_TIME 40 #define BRCMF_DEFAULT_SCAN_UNASSOC_TIME 40 -/* boost value for RSSI_DELTA in preferred join selection */ +/* default boost value for RSSI_DELTA in preferred join selection */ #define BRCMF_JOIN_PREF_RSSI_BOOST 8 +#define BRCMF_RSSI_BOOST_IS_5G 99 + +/* Module param joinboost_5g used for preferred join selection. + * Use value 99 to configure preferred join to choose 5G always over 2.4G, any + * other value configures the advantage of 5G signal strength over 2.4G signal + * strength. + */ +static int brcmf_joinboost_5g_rssi = BRCMF_JOIN_PREF_RSSI_BOOST; +module_param_named(joinboost_5g, brcmf_joinboost_5g_rssi, int, 0); +MODULE_PARM_DESC(joinboost_5g, "Join preference 5G RSSI boost"); int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) {
@@ -106,11 +117,19 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) goto done; } - /* Setup join_pref to select target by RSSI(with boost on 5GHz) */ - join_pref_params[0].type = BRCMF_JOIN_PREF_RSSI_DELTA; - join_pref_params[0].len = 2; - join_pref_params[0].rssi_gain = BRCMF_JOIN_PREF_RSSI_BOOST; - join_pref_params[0].band = WLC_BAND_5G; + if (brcmf_joinboost_5g_rssi == BRCMF_RSSI_BOOST_IS_5G) { + /* Setup join_pref to select 5GHz over 2.4Ghz */ + join_pref_params[0].type = BRCMF_JOIN_PREF_BAND; + join_pref_params[0].len = 2; + join_pref_params[0].rssi_gain = 0; + join_pref_params[0].band = WLC_BAND_5G; + } else { + /* Setup join_pref to select target by RSSI (boost on 5GHz) */ + join_pref_params[0].type = BRCMF_JOIN_PREF_RSSI_DELTA; + join_pref_params[0].len = 2; + join_pref_params[0].rssi_gain = brcmf_joinboost_5g_rssi; + join_pref_params[0].band = WLC_BAND_5G; + } join_pref_params[1].type = BRCMF_JOIN_PREF_RSSI; join_pref_params[1].len = 2; join_pref_params[1].rssi_gain = 0;
--
1.9.1