linux-kernel - [PATCH v2 07/65] staging: wfx: simplify hif_set_rcpi_rssi

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Message-ID: <20200115135338.14374-8-Jerome.Pouiller@silabs.com>
Date:   Wed, 15 Jan 2020 13:54:12 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH v2 07/65] staging: wfx: simplify hif_set_rcpi_rssi_threshold()
 usage

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

The structure hif_mib_rcpi_rssi_threshold come from hardware API. It is
not intended to be manipulated in upper layers of the driver.

In add, current code for hif_set_rcpi_rssi_threshold() is dumb. It
should pack data using the hardware representation instead of leaving
all work to the caller.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/hif_tx_mib.h | 19 +++++++++++++++++--
 drivers/staging/wfx/sta.c        | 26 ++------------------------
 2 files changed, 19 insertions(+), 26 deletions(-)

diff --git a/drivers/staging/wfx/hif_tx_mib.h b/drivers/staging/wfx/hif_tx_mib.h
index 749df67131c3..a8082508fbfd 100644
--- a/drivers/staging/wfx/hif_tx_mib.h
+++ b/drivers/staging/wfx/hif_tx_mib.h
@@ -44,10 +44,25 @@ static inline int hif_set_beacon_wakeup_period(struct wfx_vif *wvif,
 }
 
 static inline int hif_set_rcpi_rssi_threshold(struct wfx_vif *wvif,
-					      struct hif_mib_rcpi_rssi_threshold *arg)
+					      int rssi_thold, int rssi_hyst)
 {
+	struct hif_mib_rcpi_rssi_threshold arg = {
+		.rolling_average_count = 8,
+		.detection = 1,
+	};
+
+	if (!rssi_thold && !rssi_hyst) {
+		arg.upperthresh = 1;
+		arg.lowerthresh = 1;
+	} else {
+		arg.upper_threshold = rssi_thold + rssi_hyst;
+		arg.upper_threshold = (arg.upper_threshold + 110) * 2;
+		arg.lower_threshold = rssi_thold;
+		arg.lower_threshold = (arg.lower_threshold + 110) * 2;
+	}
+
 	return hif_write_mib(wvif->wdev, wvif->id,
-			     HIF_MIB_ID_RCPI_RSSI_THRESHOLD, arg, sizeof(*arg));
+			     HIF_MIB_ID_RCPI_RSSI_THRESHOLD, &arg, sizeof(arg));
 }
 
 static inline int hif_get_counters_table(struct wfx_dev *wdev,
diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index 11e33a6d5bb5..339acbce96fb 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -1033,31 +1033,9 @@ void wfx_bss_info_changed(struct ieee80211_hw *hw,
 		hif_slot_time(wvif, info->use_short_slot ? 9 : 20);
 
 	if (changed & BSS_CHANGED_ASSOC || changed & BSS_CHANGED_CQM) {
-		struct hif_mib_rcpi_rssi_threshold th = {
-			.rolling_average_count = 8,
-			.detection = 1,
-		};
-
 		wvif->cqm_rssi_thold = info->cqm_rssi_thold;
-
-		if (!info->cqm_rssi_thold && !info->cqm_rssi_hyst) {
-			th.upperthresh = 1;
-			th.lowerthresh = 1;
-		} else {
-			/* FIXME It's not a correct way of setting threshold.
-			 * Upper and lower must be set equal here and adjusted
-			 * in callback. However current implementation is much
-			 * more reliable and stable.
-			 */
-			/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
-			 * RSSI = RCPI / 2 - 110
-			 */
-			th.upper_threshold = info->cqm_rssi_thold + info->cqm_rssi_hyst;
-			th.upper_threshold = (th.upper_threshold + 110) * 2;
-			th.lower_threshold = info->cqm_rssi_thold;
-			th.lower_threshold = (th.lower_threshold + 110) * 2;
-		}
-		hif_set_rcpi_rssi_threshold(wvif, &th);
+		hif_set_rcpi_rssi_threshold(wvif, info->cqm_rssi_thold,
+					    info->cqm_rssi_hyst);
 	}
 
 	if (changed & BSS_CHANGED_TXPOWER &&
-- 
2.25.0