+static inline u16 get_tid(struct ieee80211_hdr *hdr)
+{
+ return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
+}
+
+/* This function will only work on uint32_t-aligned pointers! */
+static inline bool compare_ether_address(const void *_d0, const void *_d1)
+{
+ const uint32_t *d0 = _d0;
+ const uint32_t *d1 = _d1;
+
+ /* BUG_ON((unsigned long)d0 & 3 || (unsigned long)d1 & 3)) */
+ return !((d0[0] ^ d1[0]) | (unsigned short)(d0[1] ^ d1[1]));
+}
+
+#ifdef CONFIG_CARL9170FW_TX_AMPDU
+static void wlan_tx_ampdu(struct carl9170_tx_superframe *super)
+{
+ unsigned int qidx = super->s.queue;
+ struct carl9170_tx_superframe *ht_prev = fw.wlan.ampdu_prev[qidx];
+
+ if (!super->f.hdr.mac.ampdu) {
+ fw.wlan.ampdu_prev[qidx] = NULL;
+
+ if (ht_prev)
+ ht_prev->f.hdr.mac.ba_end = 1;
+ } else {
+ fw.wlan.ampdu_prev[qidx] = super;
+
+ if (ht_prev && (get_tid(&super->f.data.i3e) != get_tid(&ht_prev->f.data.i3e) ||
+ !compare_ether_address(super->f.data.i3e.addr1, ht_prev->f.data.i3e.addr1)))
+ ht_prev->f.hdr.mac.ba_end = 1;
+ else
+ super->f.hdr.mac.ba_end = 0;
+ }
+}
+#endif /* CONFIG_CARL9170FW_TX_AMPDU */
+