1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Data receiving implementation. 4 * 5 * Copyright (c) 2017-2020, Silicon Laboratories, Inc. 6 * Copyright (c) 2010, ST-Ericsson 7 */ 8 #include <linux/etherdevice.h> 9 #include <net/mac80211.h> 10 11 #include "data_rx.h" 12 #include "wfx.h" 13 #include "bh.h" 14 #include "sta.h" 15 16 static void wfx_rx_handle_ba(struct wfx_vif *wvif, struct ieee80211_mgmt *mgmt) 17 { 18 int params, tid; 19 20 if (wfx_api_older_than(wvif->wdev, 3, 6)) 21 return; 22 23 switch (mgmt->u.action.u.addba_req.action_code) { 24 case WLAN_ACTION_ADDBA_REQ: 25 params = le16_to_cpu(mgmt->u.action.u.addba_req.capab); 26 tid = (params & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; 27 ieee80211_start_rx_ba_session_offl(wvif->vif, mgmt->sa, tid); 28 break; 29 case WLAN_ACTION_DELBA: 30 params = le16_to_cpu(mgmt->u.action.u.delba.params); 31 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; 32 ieee80211_stop_rx_ba_session_offl(wvif->vif, mgmt->sa, tid); 33 break; 34 } 35 } 36 37 void wfx_rx_cb(struct wfx_vif *wvif, const struct wfx_hif_ind_rx *arg, struct sk_buff *skb) 38 { 39 struct ieee80211_rx_status *hdr = IEEE80211_SKB_RXCB(skb); 40 struct ieee80211_hdr *frame = (struct ieee80211_hdr *)skb->data; 41 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 42 43 memset(hdr, 0, sizeof(*hdr)); 44 45 if (arg->status == HIF_STATUS_RX_FAIL_MIC) 46 hdr->flag |= RX_FLAG_MMIC_ERROR | RX_FLAG_IV_STRIPPED; 47 else if (arg->status) 48 goto drop; 49 50 if (skb->len < sizeof(struct ieee80211_pspoll)) { 51 dev_warn(wvif->wdev->dev, "malformed SDU received\n"); 52 goto drop; 53 } 54 55 hdr->band = NL80211_BAND_2GHZ; 56 hdr->freq = ieee80211_channel_to_frequency(arg->channel_number, hdr->band); 57 58 if (arg->rxed_rate >= 14) { 59 hdr->encoding = RX_ENC_HT; 60 hdr->rate_idx = arg->rxed_rate - 14; 61 } else if (arg->rxed_rate >= 4) { 62 hdr->rate_idx = arg->rxed_rate - 2; 63 } else { 64 hdr->rate_idx = arg->rxed_rate; 65 } 66 67 if (!arg->rcpi_rssi) { 68 hdr->flag |= RX_FLAG_NO_SIGNAL_VAL; 69 dev_info(wvif->wdev->dev, "received frame without RSSI data\n"); 70 } 71 hdr->signal = arg->rcpi_rssi / 2 - 110; 72 hdr->antenna = 0; 73 74 if (arg->encryp) 75 hdr->flag |= RX_FLAG_DECRYPTED; 76 77 /* Block ack negotiation is offloaded by the firmware. However, re-ordering must be done by 78 * the mac80211. 79 */ 80 if (ieee80211_is_action(frame->frame_control) && 81 mgmt->u.action.category == WLAN_CATEGORY_BACK && 82 skb->len > IEEE80211_MIN_ACTION_SIZE) { 83 wfx_rx_handle_ba(wvif, mgmt); 84 goto drop; 85 } 86 87 ieee80211_rx_irqsafe(wvif->wdev->hw, skb); 88 return; 89 90 drop: 91 dev_kfree_skb(skb); 92 } 93