Merge tag 'wireless-next-2022-05-03' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Kalle Valo says:

====================
wireless-next patches for v5.19

First set of patches for v5.19 and this is a big one. We have two new
drivers, a change in mac80211 STA API affecting most drivers and
ath11k getting support for WCN6750. And as usual lots of fixes and
cleanups all over.

Major changes:

new drivers
 - wfx: silicon labs devices
 - plfxlc: pureLiFi X, XL, XC devices

mac80211
 - host based BSS color collision detection
 - prepare sta handling for IEEE 802.11be Multi-Link Operation (MLO) support

rtw88
 - support TP-Link T2E devices

rtw89
 - support firmware crash simulation
 - preparation for 8852ce hardware support

ath11k
 - Wake-on-WLAN support for QCA6390 and WCN6855
 - device recovery (firmware restart) support for QCA6390 and WCN6855
 - support setting Specific Absorption Rate (SAR) for WCN6855
 - read country code from SMBIOS for WCN6855/QCA6390
 - support for WCN6750

wcn36xx
 - support for transmit rate reporting to user space

* tag 'wireless-next-2022-05-03' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (228 commits)
  rtw89: 8852c: rfk: add DPK
  rtw89: 8852c: rfk: add IQK
  rtw89: 8852c: rfk: add RX DCK
  rtw89: 8852c: rfk: add RCK
  rtw89: 8852c: rfk: add TSSI
  rtw89: 8852c: rfk: add LCK
  rtw89: 8852c: rfk: add DACK
  rtw89: 8852c: rfk: add RFK tables
  plfxlc: fix le16_to_cpu warning for beacon_interval
  rtw88: remove a copy of the NAPI_POLL_WEIGHT define
  carl9170: tx: fix an incorrect use of list iterator
  wil6210: use NAPI_POLL_WEIGHT for napi budget
  ath10k: remove a copy of the NAPI_POLL_WEIGHT define
  ath11k: Add support for WCN6750 device
  ath11k: Datapath changes to support WCN6750
  ath11k: HAL changes to support WCN6750
  ath11k: Add QMI changes for WCN6750
  ath11k: Fetch device information via QMI for WCN6750
  ath11k: Add register access logic for WCN6750
  ath11k: Add HW params for WCN6750
  ...
====================

Link: https://lore.kernel.org/r/20220503153622.C1671C385A4@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/net/wireless/silabs/wfx/scan.c b/drivers/net/wireless/silabs/wfx/scan.c
new file mode 100644
index 000000000000..7f34f0d322f9
--- /dev/null
+++ b/drivers/net/wireless/silabs/wfx/scan.c
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Scan related functions.
+ *
+ * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#include <net/mac80211.h>
+
+#include "scan.h"
+#include "wfx.h"
+#include "sta.h"
+#include "hif_tx_mib.h"
+
+static void wfx_ieee80211_scan_completed_compat(struct ieee80211_hw *hw, bool aborted)
+{
+	struct cfg80211_scan_info info = {
+		.aborted = aborted,
+	};
+
+	ieee80211_scan_completed(hw, &info);
+}
+
+static int update_probe_tmpl(struct wfx_vif *wvif, struct cfg80211_scan_request *req)
+{
+	struct sk_buff *skb;
+
+	skb = ieee80211_probereq_get(wvif->wdev->hw, wvif->vif->addr, NULL, 0, req->ie_len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_data(skb, req->ie, req->ie_len);
+	wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBREQ, 0);
+	dev_kfree_skb(skb);
+	return 0;
+}
+
+static int send_scan_req(struct wfx_vif *wvif, struct cfg80211_scan_request *req, int start_idx)
+{
+	int i, ret;
+	struct ieee80211_channel *ch_start, *ch_cur;
+
+	for (i = start_idx; i < req->n_channels; i++) {
+		ch_start = req->channels[start_idx];
+		ch_cur = req->channels[i];
+		WARN(ch_cur->band != NL80211_BAND_2GHZ, "band not supported");
+		if (ch_cur->max_power != ch_start->max_power)
+			break;
+		if ((ch_cur->flags ^ ch_start->flags) & IEEE80211_CHAN_NO_IR)
+			break;
+	}
+	wfx_tx_lock_flush(wvif->wdev);
+	wvif->scan_abort = false;
+	reinit_completion(&wvif->scan_complete);
+	ret = wfx_hif_scan(wvif, req, start_idx, i - start_idx);
+	if (ret) {
+		wfx_tx_unlock(wvif->wdev);
+		return -EIO;
+	}
+	ret = wait_for_completion_timeout(&wvif->scan_complete, 1 * HZ);
+	if (!ret) {
+		wfx_hif_stop_scan(wvif);
+		ret = wait_for_completion_timeout(&wvif->scan_complete, 1 * HZ);
+		dev_dbg(wvif->wdev->dev, "scan timeout (%d channels done)\n",
+			wvif->scan_nb_chan_done);
+	}
+	if (!ret) {
+		dev_err(wvif->wdev->dev, "scan didn't stop\n");
+		ret = -ETIMEDOUT;
+	} else if (wvif->scan_abort) {
+		dev_notice(wvif->wdev->dev, "scan abort\n");
+		ret = -ECONNABORTED;
+	} else if (wvif->scan_nb_chan_done > i - start_idx) {
+		ret = -EIO;
+	} else {
+		ret = wvif->scan_nb_chan_done;
+	}
+	if (req->channels[start_idx]->max_power != wvif->vif->bss_conf.txpower)
+		wfx_hif_set_output_power(wvif, wvif->vif->bss_conf.txpower);
+	wfx_tx_unlock(wvif->wdev);
+	return ret;
+}
+
+/* It is not really necessary to run scan request asynchronously. However,
+ * there is a bug in "iw scan" when ieee80211_scan_completed() is called before
+ * wfx_hw_scan() return
+ */
+void wfx_hw_scan_work(struct work_struct *work)
+{
+	struct wfx_vif *wvif = container_of(work, struct wfx_vif, scan_work);
+	struct ieee80211_scan_request *hw_req = wvif->scan_req;
+	int chan_cur, ret, err;
+
+	mutex_lock(&wvif->wdev->conf_mutex);
+	mutex_lock(&wvif->scan_lock);
+	if (wvif->join_in_progress) {
+		dev_info(wvif->wdev->dev, "abort in-progress REQ_JOIN");
+		wfx_reset(wvif);
+	}
+	update_probe_tmpl(wvif, &hw_req->req);
+	chan_cur = 0;
+	err = 0;
+	do {
+		ret = send_scan_req(wvif, &hw_req->req, chan_cur);
+		if (ret > 0) {
+			chan_cur += ret;
+			err = 0;
+		}
+		if (!ret)
+			err++;
+		if (err > 2) {
+			dev_err(wvif->wdev->dev, "scan has not been able to start\n");
+			ret = -ETIMEDOUT;
+		}
+	} while (ret >= 0 && chan_cur < hw_req->req.n_channels);
+	mutex_unlock(&wvif->scan_lock);
+	mutex_unlock(&wvif->wdev->conf_mutex);
+	wfx_ieee80211_scan_completed_compat(wvif->wdev->hw, ret < 0);
+}
+
+int wfx_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		struct ieee80211_scan_request *hw_req)
+{
+	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
+
+	WARN_ON(hw_req->req.n_channels > HIF_API_MAX_NB_CHANNELS);
+	wvif->scan_req = hw_req;
+	schedule_work(&wvif->scan_work);
+	return 0;
+}
+
+void wfx_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+{
+	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
+
+	wvif->scan_abort = true;
+	wfx_hif_stop_scan(wvif);
+}
+
+void wfx_scan_complete(struct wfx_vif *wvif, int nb_chan_done)
+{
+	wvif->scan_nb_chan_done = nb_chan_done;
+	complete(&wvif->scan_complete);
+}