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
wfx_rx_handle_ba(struct wfx_vif * wvif,struct ieee80211_mgmt * mgmt)16 static void wfx_rx_handle_ba(struct wfx_vif *wvif, struct ieee80211_mgmt *mgmt)
17 {
18 struct ieee80211_vif *vif = wvif_to_vif(wvif);
19 int params, tid;
20
21 if (wfx_api_older_than(wvif->wdev, 3, 6))
22 return;
23
24 switch (mgmt->u.action.u.addba_req.action_code) {
25 case WLAN_ACTION_ADDBA_REQ:
26 params = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
27 tid = (params & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
28 ieee80211_start_rx_ba_session_offl(vif, mgmt->sa, tid);
29 break;
30 case WLAN_ACTION_DELBA:
31 params = le16_to_cpu(mgmt->u.action.u.delba.params);
32 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
33 ieee80211_stop_rx_ba_session_offl(vif, mgmt->sa, tid);
34 break;
35 }
36 }
37
wfx_rx_cb(struct wfx_vif * wvif,const struct wfx_hif_ind_rx * arg,struct sk_buff * skb)38 void wfx_rx_cb(struct wfx_vif *wvif, const struct wfx_hif_ind_rx *arg, struct sk_buff *skb)
39 {
40 struct ieee80211_rx_status *hdr = IEEE80211_SKB_RXCB(skb);
41 struct ieee80211_hdr *frame = (struct ieee80211_hdr *)skb->data;
42 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
43
44 memset(hdr, 0, sizeof(*hdr));
45
46 if (arg->status == HIF_STATUS_RX_FAIL_MIC)
47 hdr->flag |= RX_FLAG_MMIC_ERROR | RX_FLAG_IV_STRIPPED;
48 else if (arg->status)
49 goto drop;
50
51 if (skb->len < sizeof(struct ieee80211_pspoll)) {
52 dev_warn(wvif->wdev->dev, "malformed SDU received\n");
53 goto drop;
54 }
55
56 hdr->band = NL80211_BAND_2GHZ;
57 hdr->freq = ieee80211_channel_to_frequency(arg->channel_number, hdr->band);
58
59 if (arg->rxed_rate >= 14) {
60 hdr->encoding = RX_ENC_HT;
61 hdr->rate_idx = arg->rxed_rate - 14;
62 } else if (arg->rxed_rate >= 4) {
63 hdr->rate_idx = arg->rxed_rate - 2;
64 } else {
65 hdr->rate_idx = arg->rxed_rate;
66 }
67
68 if (!arg->rcpi_rssi) {
69 hdr->flag |= RX_FLAG_NO_SIGNAL_VAL;
70 dev_info(wvif->wdev->dev, "received frame without RSSI data\n");
71 }
72 hdr->signal = arg->rcpi_rssi / 2 - 110;
73 hdr->antenna = 0;
74
75 if (arg->encryp)
76 hdr->flag |= RX_FLAG_DECRYPTED;
77
78 /* Block ack negotiation is offloaded by the firmware. However, re-ordering must be done by
79 * the mac80211.
80 */
81 if (ieee80211_is_action(frame->frame_control) &&
82 mgmt->u.action.category == WLAN_CATEGORY_BACK &&
83 skb->len > IEEE80211_MIN_ACTION_SIZE) {
84 wfx_rx_handle_ba(wvif, mgmt);
85 goto drop;
86 }
87
88 ieee80211_rx_irqsafe(wvif->wdev->hw, skb);
89 return;
90
91 drop:
92 dev_kfree_skb(skb);
93 }
94