ath10k: deduplicate bitrate to rate idx conversion

It's possible to derive rate index from bitrate
without any additional mapping structures/logic.

This should have little to none impact on
performance since this is only done for management
frames and the previous approach wasn't
particularly optimized.

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 8bb4c19..e62b587 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -104,6 +104,18 @@ u8 ath10k_mac_hw_rate_to_idx(const struct ieee80211_supported_band *sband,
        return 0;
 }
 
+u8 ath10k_mac_bitrate_to_idx(const struct ieee80211_supported_band *sband,
+                            u32 bitrate)
+{
+       int i;
+
+       for (i = 0; i < sband->n_bitrates; i++)
+               if (sband->bitrates[i].bitrate == bitrate)
+                       return i;
+
+       return 0;
+}
+
 /**********/
 /* Crypto */
 /**********/

diff --git a/drivers/net/wireless/ath/ath10k/mac.h b/drivers/net/wireless/ath/ath10k/mac.h
index af806c6..a381740 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.h
+++ b/drivers/net/wireless/ath/ath10k/mac.h
@@ -55,8 +55,11 @@ bool ath10k_mac_is_peer_wep_key_set(struct ath10k *ar, const u8 *addr,
                                    u8 keyidx);
 void ath10k_mac_handle_beacon(struct ath10k *ar, struct sk_buff *skb);
 void ath10k_mac_handle_beacon_miss(struct ath10k *ar, u32 vdev_id);
+
 u8 ath10k_mac_hw_rate_to_idx(const struct ieee80211_supported_band *sband,
                             u8 hw_rate);
+u8 ath10k_mac_bitrate_to_idx(const struct ieee80211_supported_band *sband,
+                            u32 bitrate);
 
 static inline struct ath10k_vif *ath10k_vif_to_arvif(struct ieee80211_vif *vif)
 {

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index ae6a038..4778031 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1352,63 +1352,6 @@ static inline enum ieee80211_band phy_mode_to_band(u32 phy_mode)
        return band;
 }
 
-static inline u8 get_rate_idx(u32 rate, enum ieee80211_band band)
-{
-       u8 rate_idx = 0;
-
-       /* rate in Kbps */
-       switch (rate) {
-       case 1000:
-               rate_idx = 0;
-               break;
-       case 2000:
-               rate_idx = 1;
-               break;
-       case 5500:
-               rate_idx = 2;
-               break;
-       case 11000:
-               rate_idx = 3;
-               break;
-       case 6000:
-               rate_idx = 4;
-               break;
-       case 9000:
-               rate_idx = 5;
-               break;
-       case 12000:
-               rate_idx = 6;
-               break;
-       case 18000:
-               rate_idx = 7;
-               break;
-       case 24000:
-               rate_idx = 8;
-               break;
-       case 36000:
-               rate_idx = 9;
-               break;
-       case 48000:
-               rate_idx = 10;
-               break;
-       case 54000:
-               rate_idx = 11;
-               break;
-       default:
-               break;
-       }
-
-       if (band == IEEE80211_BAND_5GHZ) {
-               if (rate_idx > 3)
-                       /* Omit CCK rates */
-                       rate_idx -= 4;
-               else
-                       rate_idx = 0;
-       }
-
-       return rate_idx;
-}
-
 /* If keys are configured, HW decrypts all frames
  * with protected bit set. Mark such frames as decrypted.
  */
@@ -1490,6 +1433,7 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
        struct wmi_mgmt_rx_ev_arg arg = {};
        struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
        struct ieee80211_hdr *hdr;
+       struct ieee80211_supported_band *sband;
        u32 rx_status;
        u32 channel;
        u32 phy_mode;
@@ -1560,9 +1504,11 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
        if (phy_mode == MODE_11B && status->band == IEEE80211_BAND_5GHZ)
                ath10k_dbg(ar, ATH10K_DBG_MGMT, "wmi mgmt rx 11b (CCK) on 5GHz\n");
 
+       sband = &ar->mac.sbands[status->band];
+
        status->freq = ieee80211_channel_to_frequency(channel, status->band);
        status->signal = snr + ATH10K_DEFAULT_NOISE_FLOOR;
-       status->rate_idx = get_rate_idx(rate, status->band);
+       status->rate_idx = ath10k_mac_bitrate_to_idx(sband, rate / 100);
 
        hdr = (struct ieee80211_hdr *)skb->data;
        fc = le16_to_cpu(hdr->frame_control);