ath10k: fix rts/fragmentation threshold setup

If RTS and fragmentation threshold values are
0xFFFFFFFF they should be considered disabled and
no min/max limits must be applied.

This fixes some issues with throughput issues,
especially with VHT.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 6144b3b..d0a7761 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -332,6 +332,29 @@ static int ath10k_peer_create(struct ath10k *ar, u32 vdev_id, const u8 *addr)
        return 0;
 }
 
+static int  ath10k_mac_set_rts(struct ath10k_vif *arvif, u32 value)
+{
+       if (value != 0xFFFFFFFF)
+               value = min_t(u32, arvif->ar->hw->wiphy->rts_threshold,
+                             ATH10K_RTS_MAX);
+
+       return ath10k_wmi_vdev_set_param(arvif->ar, arvif->vdev_id,
+                                        WMI_VDEV_PARAM_RTS_THRESHOLD,
+                                        value);
+}
+
+static int ath10k_mac_set_frag(struct ath10k_vif *arvif, u32 value)
+{
+       if (value != 0xFFFFFFFF)
+               value = clamp_t(u32, arvif->ar->hw->wiphy->frag_threshold,
+                               ATH10K_FRAGMT_THRESHOLD_MIN,
+                               ATH10K_FRAGMT_THRESHOLD_MAX);
+
+       return ath10k_wmi_vdev_set_param(arvif->ar, arvif->vdev_id,
+                                        WMI_VDEV_PARAM_FRAGMENTATION_THRESHOLD,
+                                        value);
+}
+
 static int ath10k_peer_delete(struct ath10k *ar, u32 vdev_id, const u8 *addr)
 {
        int ret;
@@ -1897,7 +1920,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
        struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
        enum wmi_sta_powersave_param param;
        int ret = 0;
-       u32 value, rts, frag;
+       u32 value;
        int bit;
 
        mutex_lock(&ar->conf_mutex);
@@ -2000,20 +2023,12 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
                        ath10k_warn("Failed to set PSPOLL count: %d\n", ret);
        }
 
-       rts = min_t(u32, ar->hw->wiphy->rts_threshold, ATH10K_RTS_MAX);
-       ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id,
-                                        WMI_VDEV_PARAM_RTS_THRESHOLD,
-                                        rts);
+       ret = ath10k_mac_set_rts(arvif, ar->hw->wiphy->rts_threshold);
        if (ret)
                ath10k_warn("failed to set rts threshold for vdev %d (%d)\n",
                            arvif->vdev_id, ret);
 
-       frag = clamp_t(u32, ar->hw->wiphy->frag_threshold,
-                      ATH10K_FRAGMT_THRESHOLD_MIN,
-                      ATH10K_FRAGMT_THRESHOLD_MAX);
-       ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id,
-                                       WMI_VDEV_PARAM_FRAGMENTATION_THRESHOLD,
-                                       frag);
+       ret = ath10k_mac_set_frag(arvif, ar->hw->wiphy->frag_threshold);
        if (ret)
                ath10k_warn("failed to set frag threshold for vdev %d (%d)\n",
                            arvif->vdev_id, ret);
@@ -2728,11 +2743,7 @@ static void ath10k_set_rts_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
        if (ar_iter->ar->state == ATH10K_STATE_RESTARTED)
                return;
 
-       rts = min_t(u32, rts, ATH10K_RTS_MAX);
-
-       ar_iter->ret = ath10k_wmi_vdev_set_param(ar_iter->ar, arvif->vdev_id,
-                                                WMI_VDEV_PARAM_RTS_THRESHOLD,
-                                                rts);
+       ar_iter->ret = ath10k_mac_set_rts(arvif, rts);
        if (ar_iter->ret)
                ath10k_warn("Failed to set RTS threshold for VDEV: %d\n",
                            arvif->vdev_id);
@@ -2764,7 +2775,6 @@ static void ath10k_set_frag_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
        struct ath10k_generic_iter *ar_iter = data;
        struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
        u32 frag = ar_iter->ar->hw->wiphy->frag_threshold;
-       int ret;
 
        lockdep_assert_held(&arvif->ar->conf_mutex);
 
@@ -2775,15 +2785,7 @@ static void ath10k_set_frag_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
        if (ar_iter->ar->state == ATH10K_STATE_RESTARTED)
                return;
 
-       frag = clamp_t(u32, frag,
-                      ATH10K_FRAGMT_THRESHOLD_MIN,
-                      ATH10K_FRAGMT_THRESHOLD_MAX);
-
-       ret = ath10k_wmi_vdev_set_param(ar_iter->ar, arvif->vdev_id,
-                                       WMI_VDEV_PARAM_FRAGMENTATION_THRESHOLD,
-                                       frag);
-
-       ar_iter->ret = ret;
+       ar_iter->ret = ath10k_mac_set_frag(arvif, frag);
        if (ar_iter->ret)
                ath10k_warn("Failed to set frag threshold for VDEV: %d\n",
                            arvif->vdev_id);