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