// SPDX-License-Identifier: GPL-2.0-only
/*
 * Data receiving implementation.
 *
 * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
 * Copyright (c) 2010, ST-Ericsson
 */
#include <linux/etherdevice.h>
#include <net/mac80211.h>

#include "data_rx.h"
#include "wfx.h"
#include "bh.h"
#include "sta.h"

static void wfx_rx_handle_ba(struct wfx_vif *wvif, struct ieee80211_mgmt *mgmt)
{
        struct ieee80211_vif *vif = wvif_to_vif(wvif);
        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(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(vif, mgmt->sa, tid);
                break;
        }
}

void wfx_rx_cb(struct wfx_vif *wvif, const struct wfx_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);
}