// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Datapath implementation.
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*
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* Copyright (c) 2017-2020, Silicon Laboratories, Inc.
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* Copyright (c) 2010, ST-Ericsson
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*/
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#include <linux/etherdevice.h>
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#include <net/mac80211.h>
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#include "data_rx.h"
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#include "wfx.h"
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#include "bh.h"
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#include "sta.h"
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static void wfx_rx_handle_ba(struct wfx_vif *wvif, struct ieee80211_mgmt *mgmt)
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{
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int params, tid;
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if (wfx_api_older_than(wvif->wdev, 3, 6))
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return;
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switch (mgmt->u.action.u.addba_req.action_code) {
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case WLAN_ACTION_ADDBA_REQ:
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params = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
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tid = (params & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
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ieee80211_start_rx_ba_session_offl(wvif->vif, mgmt->sa, tid);
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break;
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case WLAN_ACTION_DELBA:
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params = le16_to_cpu(mgmt->u.action.u.delba.params);
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tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
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ieee80211_stop_rx_ba_session_offl(wvif->vif, mgmt->sa, tid);
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break;
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}
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}
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void wfx_rx_cb(struct wfx_vif *wvif,
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const struct hif_ind_rx *arg, struct sk_buff *skb)
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{
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struct ieee80211_rx_status *hdr = IEEE80211_SKB_RXCB(skb);
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struct ieee80211_hdr *frame = (struct ieee80211_hdr *)skb->data;
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
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memset(hdr, 0, sizeof(*hdr));
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if (arg->status == HIF_STATUS_RX_FAIL_MIC)
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hdr->flag |= RX_FLAG_MMIC_ERROR | RX_FLAG_IV_STRIPPED;
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else if (arg->status)
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goto drop;
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if (skb->len < sizeof(struct ieee80211_pspoll)) {
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dev_warn(wvif->wdev->dev, "malformed SDU received\n");
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goto drop;
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}
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hdr->band = NL80211_BAND_2GHZ;
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hdr->freq = ieee80211_channel_to_frequency(arg->channel_number,
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hdr->band);
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if (arg->rxed_rate >= 14) {
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hdr->encoding = RX_ENC_HT;
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hdr->rate_idx = arg->rxed_rate - 14;
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} else if (arg->rxed_rate >= 4) {
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hdr->rate_idx = arg->rxed_rate - 2;
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} else {
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hdr->rate_idx = arg->rxed_rate;
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}
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if (!arg->rcpi_rssi) {
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hdr->flag |= RX_FLAG_NO_SIGNAL_VAL;
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dev_info(wvif->wdev->dev, "received frame without RSSI data\n");
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}
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hdr->signal = arg->rcpi_rssi / 2 - 110;
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hdr->antenna = 0;
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if (arg->encryp)
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hdr->flag |= RX_FLAG_DECRYPTED;
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// Block ack negotiation is offloaded by the firmware. However,
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// re-ordering must be done by the mac80211.
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if (ieee80211_is_action(frame->frame_control) &&
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mgmt->u.action.category == WLAN_CATEGORY_BACK &&
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skb->len > IEEE80211_MIN_ACTION_SIZE) {
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wfx_rx_handle_ba(wvif, mgmt);
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goto drop;
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}
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ieee80211_rx_irqsafe(wvif->wdev->hw, skb);
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return;
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drop:
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dev_kfree_skb(skb);
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}
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