Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 297 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/mwifiex/11h.c b/drivers/net/wireless/marvell/mwifiex/11h.c
new file mode 100644
index 000000000..6a9d7bc1f
--- /dev/null
+++ b/drivers/net/wireless/marvell/mwifiex/11h.c
@@ -0,0 +1,297 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: 802.11h
+ *
+ * Copyright 2011-2020 NXP
+ */
+
+#include "main.h"
+#include "fw.h"
+
+
+void mwifiex_init_11h_params(struct mwifiex_private *priv)
+{
+	priv->state_11h.is_11h_enabled = true;
+	priv->state_11h.is_11h_active = false;
+}
+
+inline int mwifiex_is_11h_active(struct mwifiex_private *priv)
+{
+	return priv->state_11h.is_11h_active;
+}
+/* This function appends 11h info to a buffer while joining an
+ * infrastructure BSS
+ */
+static void
+mwifiex_11h_process_infra_join(struct mwifiex_private *priv, u8 **buffer,
+			       struct mwifiex_bssdescriptor *bss_desc)
+{
+	struct mwifiex_ie_types_header *ie_header;
+	struct mwifiex_ie_types_pwr_capability *cap;
+	struct mwifiex_ie_types_local_pwr_constraint *constraint;
+	struct ieee80211_supported_band *sband;
+	u8 radio_type;
+	int i;
+
+	if (!buffer || !(*buffer))
+		return;
+
+	radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
+	sband = priv->wdev.wiphy->bands[radio_type];
+
+	cap = (struct mwifiex_ie_types_pwr_capability *)*buffer;
+	cap->header.type = cpu_to_le16(WLAN_EID_PWR_CAPABILITY);
+	cap->header.len = cpu_to_le16(2);
+	cap->min_pwr = 0;
+	cap->max_pwr = 0;
+	*buffer += sizeof(*cap);
+
+	constraint = (struct mwifiex_ie_types_local_pwr_constraint *)*buffer;
+	constraint->header.type = cpu_to_le16(WLAN_EID_PWR_CONSTRAINT);
+	constraint->header.len = cpu_to_le16(2);
+	constraint->chan = bss_desc->channel;
+	constraint->constraint = bss_desc->local_constraint;
+	*buffer += sizeof(*constraint);
+
+	ie_header = (struct mwifiex_ie_types_header *)*buffer;
+	ie_header->type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
+	ie_header->len  = cpu_to_le16(2 * sband->n_channels + 2);
+	*buffer += sizeof(*ie_header);
+	*(*buffer)++ = WLAN_EID_SUPPORTED_CHANNELS;
+	*(*buffer)++ = 2 * sband->n_channels;
+	for (i = 0; i < sband->n_channels; i++) {
+		*(*buffer)++ = ieee80211_frequency_to_channel(
+					sband->channels[i].center_freq);
+		*(*buffer)++ = 1; /* one channel in the subband */
+	}
+}
+
+/* Enable or disable the 11h extensions in the firmware */
+int mwifiex_11h_activate(struct mwifiex_private *priv, bool flag)
+{
+	u32 enable = flag;
+
+	/* enable master mode radar detection on AP interface */
+	if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) && enable)
+		enable |= MWIFIEX_MASTER_RADAR_DET_MASK;
+
+	return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_SNMP_MIB,
+				HostCmd_ACT_GEN_SET, DOT11H_I, &enable, true);
+}
+
+/* This functions processes TLV buffer for a pending BSS Join command.
+ *
+ * Activate 11h functionality in the firmware if the spectrum management
+ * capability bit is found in the network we are joining. Also, necessary
+ * TLVs are set based on requested network's 11h capability.
+ */
+void mwifiex_11h_process_join(struct mwifiex_private *priv, u8 **buffer,
+			      struct mwifiex_bssdescriptor *bss_desc)
+{
+	if (bss_desc->sensed_11h) {
+		/* Activate 11h functions in firmware, turns on capability
+		 * bit
+		 */
+		mwifiex_11h_activate(priv, true);
+		priv->state_11h.is_11h_active = true;
+		bss_desc->cap_info_bitmap |= WLAN_CAPABILITY_SPECTRUM_MGMT;
+		mwifiex_11h_process_infra_join(priv, buffer, bss_desc);
+	} else {
+		/* Deactivate 11h functions in the firmware */
+		mwifiex_11h_activate(priv, false);
+		priv->state_11h.is_11h_active = false;
+		bss_desc->cap_info_bitmap &= ~WLAN_CAPABILITY_SPECTRUM_MGMT;
+	}
+}
+
+/* This is DFS CAC work queue function.
+ * This delayed work emits CAC finished event for cfg80211 if
+ * CAC was started earlier.
+ */
+void mwifiex_dfs_cac_work_queue(struct work_struct *work)
+{
+	struct cfg80211_chan_def chandef;
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct mwifiex_private *priv =
+			container_of(delayed_work, struct mwifiex_private,
+				     dfs_cac_work);
+
+	chandef = priv->dfs_chandef;
+	if (priv->wdev.cac_started) {
+		mwifiex_dbg(priv->adapter, MSG,
+			    "CAC timer finished; No radar detected\n");
+		cfg80211_cac_event(priv->netdev, &chandef,
+				   NL80211_RADAR_CAC_FINISHED,
+				   GFP_KERNEL);
+	}
+}
+
+/* This function prepares channel report request command to FW for
+ * starting radar detection.
+ */
+int mwifiex_cmd_issue_chan_report_request(struct mwifiex_private *priv,
+					  struct host_cmd_ds_command *cmd,
+					  void *data_buf)
+{
+	struct host_cmd_ds_chan_rpt_req *cr_req = &cmd->params.chan_rpt_req;
+	struct mwifiex_radar_params *radar_params = (void *)data_buf;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_CHAN_REPORT_REQUEST);
+	cmd->size = cpu_to_le16(S_DS_GEN);
+	le16_unaligned_add_cpu(&cmd->size,
+			       sizeof(struct host_cmd_ds_chan_rpt_req));
+
+	cr_req->chan_desc.start_freq = cpu_to_le16(MWIFIEX_A_BAND_START_FREQ);
+	cr_req->chan_desc.chan_num = radar_params->chandef->chan->hw_value;
+	cr_req->chan_desc.chan_width = radar_params->chandef->width;
+	cr_req->msec_dwell_time = cpu_to_le32(radar_params->cac_time_ms);
+
+	if (radar_params->cac_time_ms)
+		mwifiex_dbg(priv->adapter, MSG,
+			    "11h: issuing DFS Radar check for channel=%d\n",
+			    radar_params->chandef->chan->hw_value);
+	else
+		mwifiex_dbg(priv->adapter, MSG, "cancelling CAC\n");
+
+	return 0;
+}
+
+int mwifiex_stop_radar_detection(struct mwifiex_private *priv,
+				 struct cfg80211_chan_def *chandef)
+{
+	struct mwifiex_radar_params radar_params;
+
+	memset(&radar_params, 0, sizeof(struct mwifiex_radar_params));
+	radar_params.chandef = chandef;
+	radar_params.cac_time_ms = 0;
+
+	return mwifiex_send_cmd(priv, HostCmd_CMD_CHAN_REPORT_REQUEST,
+				HostCmd_ACT_GEN_SET, 0, &radar_params, true);
+}
+
+/* This function is to abort ongoing CAC upon stopping AP operations
+ * or during unload.
+ */
+void mwifiex_abort_cac(struct mwifiex_private *priv)
+{
+	if (priv->wdev.cac_started) {
+		if (mwifiex_stop_radar_detection(priv, &priv->dfs_chandef))
+			mwifiex_dbg(priv->adapter, ERROR,
+				    "failed to stop CAC in FW\n");
+		mwifiex_dbg(priv->adapter, MSG,
+			    "Aborting delayed work for CAC.\n");
+		cancel_delayed_work_sync(&priv->dfs_cac_work);
+		cfg80211_cac_event(priv->netdev, &priv->dfs_chandef,
+				   NL80211_RADAR_CAC_ABORTED, GFP_KERNEL);
+	}
+}
+
+/* This function handles channel report event from FW during CAC period.
+ * If radar is detected during CAC, driver indicates the same to cfg80211
+ * and also cancels ongoing delayed work.
+ */
+int mwifiex_11h_handle_chanrpt_ready(struct mwifiex_private *priv,
+				     struct sk_buff *skb)
+{
+	struct host_cmd_ds_chan_rpt_event *rpt_event;
+	struct mwifiex_ie_types_chan_rpt_data *rpt;
+	u8 *evt_buf;
+	u16 event_len, tlv_len;
+
+	rpt_event = (void *)(skb->data + sizeof(u32));
+	event_len = skb->len - (sizeof(struct host_cmd_ds_chan_rpt_event)+
+				sizeof(u32));
+
+	if (le32_to_cpu(rpt_event->result) != HostCmd_RESULT_OK) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "Error in channel report event\n");
+		return -1;
+	}
+
+	evt_buf = (void *)&rpt_event->tlvbuf;
+
+	while (event_len >= sizeof(struct mwifiex_ie_types_header)) {
+		rpt = (void *)&rpt_event->tlvbuf;
+		tlv_len = le16_to_cpu(rpt->header.len);
+
+		switch (le16_to_cpu(rpt->header.type)) {
+		case TLV_TYPE_CHANRPT_11H_BASIC:
+			if (rpt->map.radar) {
+				mwifiex_dbg(priv->adapter, MSG,
+					    "RADAR Detected on channel %d!\n",
+					    priv->dfs_chandef.chan->hw_value);
+				cancel_delayed_work_sync(&priv->dfs_cac_work);
+				cfg80211_cac_event(priv->netdev,
+						   &priv->dfs_chandef,
+						   NL80211_RADAR_DETECTED,
+						   GFP_KERNEL);
+			}
+			break;
+		default:
+			break;
+		}
+
+		evt_buf += (tlv_len + sizeof(rpt->header));
+		event_len -= (tlv_len + sizeof(rpt->header));
+	}
+
+	return 0;
+}
+
+/* Handler for radar detected event from FW.*/
+int mwifiex_11h_handle_radar_detected(struct mwifiex_private *priv,
+				      struct sk_buff *skb)
+{
+	struct mwifiex_radar_det_event *rdr_event;
+
+	rdr_event = (void *)(skb->data + sizeof(u32));
+
+	mwifiex_dbg(priv->adapter, MSG,
+		    "radar detected; indicating kernel\n");
+	if (mwifiex_stop_radar_detection(priv, &priv->dfs_chandef))
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "Failed to stop CAC in FW\n");
+	cfg80211_radar_event(priv->adapter->wiphy, &priv->dfs_chandef,
+			     GFP_KERNEL);
+	mwifiex_dbg(priv->adapter, MSG, "regdomain: %d\n",
+		    rdr_event->reg_domain);
+	mwifiex_dbg(priv->adapter, MSG, "radar detection type: %d\n",
+		    rdr_event->det_type);
+
+	return 0;
+}
+
+/* This is work queue function for channel switch handling.
+ * This function takes care of updating new channel definitin to
+ * bss config structure, restart AP and indicate channel switch success
+ * to cfg80211.
+ */
+void mwifiex_dfs_chan_sw_work_queue(struct work_struct *work)
+{
+	struct mwifiex_uap_bss_param *bss_cfg;
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct mwifiex_private *priv =
+			container_of(delayed_work, struct mwifiex_private,
+				     dfs_chan_sw_work);
+
+	bss_cfg = &priv->bss_cfg;
+	if (!bss_cfg->beacon_period) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "channel switch: AP already stopped\n");
+		return;
+	}
+
+	mwifiex_uap_set_channel(priv, bss_cfg, priv->dfs_chandef);
+
+	if (mwifiex_config_start_uap(priv, bss_cfg)) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "Failed to start AP after channel switch\n");
+		return;
+	}
+
+	mwifiex_dbg(priv->adapter, MSG,
+		    "indicating channel switch completion to kernel\n");
+	mutex_lock(&priv->wdev.mtx);
+	cfg80211_ch_switch_notify(priv->netdev, &priv->dfs_chandef, 0);
+	mutex_unlock(&priv->wdev.mtx);
+}