mwifiex: get_channel from firmware

At present driver gets chan_type by referring to
IEEE80211_HT_PARAM_CHA_SEC_OFFSET, in ASSOC response. Sometimes
AP shows IEEE80211_HT_PARAM_CHA_SEC_OFFSET as above/below in
assoc response, even if the association is done on HT20 channel
only. So, it will be accurate to get econdary channel offset from
firmware.

Signed-off-by: Cathy Luo <[email protected]>
Signed-off-by: Ganapathi Bhat <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>

Author: gbhat-marvell

drivers/net/wireless/marvell/mwifiex/cfg80211.c

@@ -95,18 +95,32 @@ u8 mwifiex_chan_type_to_sec_chan_offset(enum nl80211_channel_type chan_type)
 
 /* This function maps IEEE HT secondary channel type to NL80211 channel type
  */
-u8 mwifiex_sec_chan_offset_to_chan_type(u8 second_chan_offset)
+u8 mwifiex_get_chan_type(struct mwifiex_private *priv)
 {
-	switch (second_chan_offset) {
-	case IEEE80211_HT_PARAM_CHA_SEC_NONE:
-		return NL80211_CHAN_HT20;
-	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
-		return NL80211_CHAN_HT40PLUS;
-	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
-		return NL80211_CHAN_HT40MINUS;
-	default:
-		return NL80211_CHAN_HT20;
+	struct mwifiex_channel_band channel_band;
+	int ret;
+
+	ret = mwifiex_get_chan_info(priv, &channel_band);
+
+	if (!ret) {
+		switch (channel_band.band_config.chan_width) {
+		case CHAN_BW_20MHZ:
+			if (IS_11N_ENABLED(priv))
+				return NL80211_CHAN_HT20;
+			else
+				return NL80211_CHAN_NO_HT;
+		case CHAN_BW_40MHZ:
+			if (channel_band.band_config.chan2_offset ==
+			    SEC_CHAN_ABOVE)
+				return NL80211_CHAN_HT40PLUS;
+			else
+				return NL80211_CHAN_HT40MINUS;
+		default:
+			return NL80211_CHAN_HT20;
+		}
 	}
+
+	return NL80211_CHAN_HT20;
 }
 
 /*
@@ -3937,7 +3951,6 @@ static int mwifiex_cfg80211_get_channel(struct wiphy *wiphy,
 	struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev);
 	struct mwifiex_bssdescriptor *curr_bss;
 	struct ieee80211_channel *chan;
-	u8 second_chan_offset;
 	enum nl80211_channel_type chan_type;
 	enum nl80211_band band;
 	int freq;
@@ -3954,10 +3967,7 @@ static int mwifiex_cfg80211_get_channel(struct wiphy *wiphy,
 		chan = ieee80211_get_channel(wiphy, freq);
 
 		if (priv->ht_param_present) {
-			second_chan_offset = priv->assoc_resp_ht_param &
-					IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
-			chan_type = mwifiex_sec_chan_offset_to_chan_type
-							(second_chan_offset);
+			chan_type = mwifiex_get_chan_type(priv);
 			cfg80211_chandef_create(chandef, chan, chan_type);
 		} else {
 			cfg80211_chandef_create(chandef, chan,

drivers/net/wireless/marvell/mwifiex/decl.h

@@ -294,4 +294,21 @@ enum rdwr_status {
 	RDWR_STATUS_DONE = 2
 };
 
+enum mwifiex_chan_width {
+	CHAN_BW_20MHZ = 0,
+	CHAN_BW_10MHZ,
+	CHAN_BW_40MHZ,
+	CHAN_BW_80MHZ,
+	CHAN_BW_8080MHZ,
+	CHAN_BW_160MHZ,
+	CHAN_BW_5MHZ,
+};
+
+enum mwifiex_chan_offset {
+	SEC_CHAN_NONE = 0,
+	SEC_CHAN_ABOVE = 1,
+	SEC_CHAN_5MHZ = 2,
+	SEC_CHAN_BELOW = 3
+};
+
 #endif /* !_MWIFIEX_DECL_H_ */

drivers/net/wireless/marvell/mwifiex/fw.h

@@ -411,6 +411,7 @@ enum MWIFIEX_802_11_PRIVACY_FILTER {
 #define HostCmd_CMD_TDLS_OPER                         0x0122
 #define HostCmd_CMD_FW_DUMP_EVENT		      0x0125
 #define HostCmd_CMD_SDIO_SP_RX_AGGR_CFG               0x0223
+#define HostCmd_CMD_STA_CONFIGURE		      0x023f
 #define HostCmd_CMD_CHAN_REGION_CFG		      0x0242
 #define HostCmd_CMD_PACKET_AGGR_CTRL		      0x0251
 
@@ -2285,6 +2286,11 @@ struct host_cmd_ds_pkt_aggr_ctrl {
 	__le16 tx_aggr_align;
 } __packed;
 
+struct host_cmd_ds_sta_configure {
+	__le16 action;
+	u8 tlv_buffer[0];
+} __packed;
+
 struct host_cmd_ds_command {
 	__le16 command;
 	__le16 size;
@@ -2361,6 +2367,7 @@ struct host_cmd_ds_command {
 		struct host_cmd_ds_gtk_rekey_params rekey;
 		struct host_cmd_ds_chan_region_cfg reg_cfg;
 		struct host_cmd_ds_pkt_aggr_ctrl pkt_aggr_ctrl;
+		struct host_cmd_ds_sta_configure sta_cfg;
 	} params;
 } __packed;
 

drivers/net/wireless/marvell/mwifiex/main.h

@@ -517,6 +517,18 @@ enum mwifiex_iface_work_flags {
 	MWIFIEX_IFACE_WORK_CARD_RESET,
 };
 
+struct mwifiex_band_config {
+	u8 chan_band:2;
+	u8 chan_width:2;
+	u8 chan2_offset:2;
+	u8 scan_mode:2;
+} __packed;
+
+struct mwifiex_channel_band {
+	struct mwifiex_band_config band_config;
+	u8 channel;
+};
+
 struct mwifiex_private {
 	struct mwifiex_adapter *adapter;
 	u8 bss_type;
@@ -1557,7 +1569,7 @@ int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
 					struct mwifiex_bssdescriptor *bss_desc);
 
 u8 mwifiex_chan_type_to_sec_chan_offset(enum nl80211_channel_type chan_type);
-u8 mwifiex_sec_chan_offset_to_chan_type(u8 second_chan_offset);
+u8 mwifiex_get_chan_type(struct mwifiex_private *priv);
 
 struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
 					      const char *name,
@@ -1683,6 +1695,8 @@ void mwifiex_queue_main_work(struct mwifiex_adapter *adapter);
 int mwifiex_get_wakeup_reason(struct mwifiex_private *priv, u16 action,
 			      int cmd_type,
 			      struct mwifiex_ds_wakeup_reason *wakeup_reason);
+int mwifiex_get_chan_info(struct mwifiex_private *priv,
+			  struct mwifiex_channel_band *channel_band);
 int mwifiex_ret_wakeup_reason(struct mwifiex_private *priv,
 			      struct host_cmd_ds_command *resp,
 			      struct host_cmd_ds_wakeup_reason *wakeup_reason);

drivers/net/wireless/marvell/mwifiex/sta_cmd.c

@@ -1898,6 +1898,25 @@ static int mwifiex_cmd_get_wakeup_reason(struct mwifiex_private *priv,
 	return 0;
 }
 
+static int mwifiex_cmd_get_chan_info(struct host_cmd_ds_command *cmd,
+				     u16 cmd_action)
+{
+	struct host_cmd_ds_sta_configure *sta_cfg_cmd = &cmd->params.sta_cfg;
+	struct host_cmd_tlv_channel_band *tlv_band_channel =
+	(struct host_cmd_tlv_channel_band *)sta_cfg_cmd->tlv_buffer;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_STA_CONFIGURE);
+	cmd->size = cpu_to_le16(sizeof(*sta_cfg_cmd) +
+				sizeof(*tlv_band_channel) + S_DS_GEN);
+	sta_cfg_cmd->action = cpu_to_le16(cmd_action);
+	memset(tlv_band_channel, 0, sizeof(*tlv_band_channel));
+	tlv_band_channel->header.type = cpu_to_le16(TLV_TYPE_CHANNELBANDLIST);
+	tlv_band_channel->header.len  = cpu_to_le16(sizeof(*tlv_band_channel) -
+					sizeof(struct mwifiex_ie_types_header));
+
+	return 0;
+}
+
 /* This function check if the command is supported by firmware */
 static int mwifiex_is_cmd_supported(struct mwifiex_private *priv, u16 cmd_no)
 {
@@ -2210,6 +2229,9 @@ int mwifiex_sta_prepare_cmd(struct mwifiex_private *priv, uint16_t cmd_no,
 		cmd_ptr->command = cpu_to_le16(cmd_no);
 		cmd_ptr->size = cpu_to_le16(S_DS_GEN);
 		break;
+	case HostCmd_CMD_STA_CONFIGURE:
+		ret = mwifiex_cmd_get_chan_info(cmd_ptr, cmd_action);
+		break;
 	default:
 		mwifiex_dbg(priv->adapter, ERROR,
 			    "PREP_CMD: unknown cmd- %#x\n", cmd_no);

drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c

@@ -1170,6 +1170,22 @@ static int mwifiex_ret_pkt_aggr_ctrl(struct mwifiex_private *priv,
 	return 0;
 }
 
+static int mwifiex_ret_get_chan_info(struct mwifiex_private *priv,
+				     struct host_cmd_ds_command *resp,
+				     struct mwifiex_channel_band *channel_band)
+{
+	struct host_cmd_ds_sta_configure *sta_cfg_cmd = &resp->params.sta_cfg;
+	struct host_cmd_tlv_channel_band *tlv_band_channel;
+
+	tlv_band_channel =
+	(struct host_cmd_tlv_channel_band *)sta_cfg_cmd->tlv_buffer;
+	memcpy(&channel_band->band_config, &tlv_band_channel->band_config,
+	       sizeof(struct mwifiex_band_config));
+	channel_band->channel = tlv_band_channel->channel;
+
+	return 0;
+}
+
 /*
  * This function handles the command responses.
  *
@@ -1393,6 +1409,9 @@ int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
 	case HostCmd_CMD_CHAN_REGION_CFG:
 		ret = mwifiex_ret_chan_region_cfg(priv, resp);
 		break;
+	case HostCmd_CMD_STA_CONFIGURE:
+		ret = mwifiex_ret_get_chan_info(priv, resp, data_buf);
+		break;
 	default:
 		mwifiex_dbg(adapter, ERROR,
 			    "CMD_RESP: unknown cmd response %#x\n",

drivers/net/wireless/marvell/mwifiex/sta_ioctl.c

@@ -1481,3 +1481,15 @@ int mwifiex_get_wakeup_reason(struct mwifiex_private *priv, u16 action,
 
 	return status;
 }
+
+int mwifiex_get_chan_info(struct mwifiex_private *priv,
+			  struct mwifiex_channel_band *channel_band)
+{
+	int status = 0;
+
+	status = mwifiex_send_cmd(priv, HostCmd_CMD_STA_CONFIGURE,
+				  HostCmd_ACT_GEN_GET, 0, channel_band,
+				  MWIFIEX_SYNC_CMD);
+
+	return status;
+}