--- /dev/null
+/*
+ * Marvell Wireless LAN device driver: 802.11h
+ *
+ * Copyright (C) 2013-2014, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#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 =
+ container_of(work, struct delayed_work, work);
+ struct mwifiex_private *priv =
+ container_of(delayed_work, struct mwifiex_private,
+ dfs_cac_work);
+
+ if (WARN_ON(!priv))
+ return;
+
+ chandef = priv->dfs_chandef;
+ if (priv->wdev.cac_started) {
+ dev_dbg(priv->adapter->dev,
+ "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_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);
+
+ dev_dbg(priv->adapter->dev,
+ "11h: issuing DFS Radar check for channel=%d\n",
+ radar_params->chandef->chan->hw_value);
+
+ return 0;
+}
+
+/* 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) {
+ dev_dbg(priv->adapter->dev,
+ "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) {
+ dev_err(priv->adapter->dev, "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) {
+ dev_notice(priv->adapter->dev,
+ "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));
+
+ if (le32_to_cpu(rdr_event->passed)) {
+ dev_notice(priv->adapter->dev,
+ "radar detected; indicating kernel\n");
+ cfg80211_radar_event(priv->adapter->wiphy, &priv->dfs_chandef,
+ GFP_KERNEL);
+ dev_dbg(priv->adapter->dev, "regdomain: %d\n",
+ rdr_event->reg_domain);
+ dev_dbg(priv->adapter->dev, "radar detection type: %d\n",
+ rdr_event->det_type);
+ } else {
+ dev_dbg(priv->adapter->dev, "false radar detection event!\n");
+ }
+
+ 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 =
+ container_of(work, struct delayed_work, work);
+ struct mwifiex_private *priv =
+ container_of(delayed_work, struct mwifiex_private,
+ dfs_chan_sw_work);
+
+ if (WARN_ON(!priv))
+ return;
+
+ bss_cfg = &priv->bss_cfg;
+ if (!bss_cfg->beacon_period) {
+ dev_err(priv->adapter->dev,
+ "channel switch: AP already stopped\n");
+ return;
+ }
+
+ mwifiex_uap_set_channel(bss_cfg, priv->dfs_chandef);
+
+ if (mwifiex_config_start_uap(priv, bss_cfg)) {
+ dev_dbg(priv->adapter->dev,
+ "Failed to start AP after channel switch\n");
+ return;
+ }
+
+ dev_notice(priv->adapter->dev,
+ "indicating channel switch completion to kernel\n");
+ cfg80211_ch_switch_notify(priv->netdev, &priv->dfs_chandef);
+}
Code Review / kvmfornfv.git / blobdiff