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Subject[PATCH 15/23] wfx: add data_rx.c/data_rx.h
Date
From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
drivers/net/wireless/silabs/wfx/data_rx.c | 93 +++++++++++++++++++++++
drivers/net/wireless/silabs/wfx/data_rx.h | 18 +++++
2 files changed, 111 insertions(+)
create mode 100644 drivers/net/wireless/silabs/wfx/data_rx.c
create mode 100644 drivers/net/wireless/silabs/wfx/data_rx.h

diff --git a/drivers/net/wireless/silabs/wfx/data_rx.c b/drivers/net/wireless/silabs/wfx/data_rx.c
new file mode 100644
index 000000000000..385f2d42a0e2
--- /dev/null
+++ b/drivers/net/wireless/silabs/wfx/data_rx.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Datapath 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)
+{
+ 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);
+}
diff --git a/drivers/net/wireless/silabs/wfx/data_rx.h b/drivers/net/wireless/silabs/wfx/data_rx.h
new file mode 100644
index 000000000000..4c0da37f2084
--- /dev/null
+++ b/drivers/net/wireless/silabs/wfx/data_rx.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Datapath implementation.
+ *
+ * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#ifndef WFX_DATA_RX_H
+#define WFX_DATA_RX_H
+
+struct wfx_vif;
+struct sk_buff;
+struct hif_ind_rx;
+
+void wfx_rx_cb(struct wfx_vif *wvif,
+ const struct hif_ind_rx *arg, struct sk_buff *skb);
+
+#endif /* WFX_DATA_RX_H */
--
2.28.0
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