drivers/net/wireless/mwifiex/uap_cmd.c

/*
 * Marvell Wireless LAN device driver: AP specific command handling
 *
 * Copyright (C) 2012, 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"

/* This function parses security related parameters from cfg80211_ap_settings
 * and sets into FW understandable bss_config structure.
 */
int mwifiex_set_secure_params(struct mwifiex_private *priv,
			      struct mwifiex_uap_bss_param *bss_config,
			      struct cfg80211_ap_settings *params) {
	int i;

	if (!params->privacy) {
		bss_config->protocol = PROTOCOL_NO_SECURITY;
		bss_config->key_mgmt = KEY_MGMT_NONE;
		bss_config->wpa_cfg.length = 0;
		priv->sec_info.wep_enabled = 0;
		priv->sec_info.wpa_enabled = 0;
		priv->sec_info.wpa2_enabled = 0;

		return 0;
	}

	switch (params->auth_type) {
	case NL80211_AUTHTYPE_OPEN_SYSTEM:
		bss_config->auth_mode = WLAN_AUTH_OPEN;
		break;
	case NL80211_AUTHTYPE_SHARED_KEY:
		bss_config->auth_mode = WLAN_AUTH_SHARED_KEY;
		break;
	case NL80211_AUTHTYPE_NETWORK_EAP:
		bss_config->auth_mode = WLAN_AUTH_LEAP;
		break;
	default:
		bss_config->auth_mode = MWIFIEX_AUTH_MODE_AUTO;
		break;
	}

	bss_config->key_mgmt_operation |= KEY_MGMT_ON_HOST;

	for (i = 0; i < params->crypto.n_akm_suites; i++) {
		switch (params->crypto.akm_suites[i]) {
		case WLAN_AKM_SUITE_8021X:
			if (params->crypto.wpa_versions &
			    NL80211_WPA_VERSION_1) {
				bss_config->protocol = PROTOCOL_WPA;
				bss_config->key_mgmt = KEY_MGMT_EAP;
			}
			if (params->crypto.wpa_versions &
			    NL80211_WPA_VERSION_2) {
				bss_config->protocol = PROTOCOL_WPA2;
				bss_config->key_mgmt = KEY_MGMT_EAP;
			}
			break;
		case WLAN_AKM_SUITE_PSK:
			if (params->crypto.wpa_versions &
			    NL80211_WPA_VERSION_1) {
				bss_config->protocol = PROTOCOL_WPA;
				bss_config->key_mgmt = KEY_MGMT_PSK;
			}
			if (params->crypto.wpa_versions &
			    NL80211_WPA_VERSION_2) {
				bss_config->protocol = PROTOCOL_WPA2;
				bss_config->key_mgmt = KEY_MGMT_PSK;
			}
			break;
		default:
			break;
		}
	}
	for (i = 0; i < params->crypto.n_ciphers_pairwise; i++) {
		switch (params->crypto.ciphers_pairwise[i]) {
		case WLAN_CIPHER_SUITE_WEP40:
		case WLAN_CIPHER_SUITE_WEP104:
			break;
		case WLAN_CIPHER_SUITE_TKIP:
			bss_config->wpa_cfg.pairwise_cipher_wpa = CIPHER_TKIP;
			break;
		case WLAN_CIPHER_SUITE_CCMP:
			bss_config->wpa_cfg.pairwise_cipher_wpa2 =
								CIPHER_AES_CCMP;
		default:
			break;
		}
	}

	switch (params->crypto.cipher_group) {
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		break;
	case WLAN_CIPHER_SUITE_TKIP:
		bss_config->wpa_cfg.group_cipher = CIPHER_TKIP;
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		bss_config->wpa_cfg.group_cipher = CIPHER_AES_CCMP;
		break;
	default:
		break;
	}

	return 0;
}

/* This function initializes some of mwifiex_uap_bss_param variables.
 * This helps FW in ignoring invalid values. These values may or may not
 * be get updated to valid ones at later stage.
 */
void mwifiex_set_sys_config_invalid_data(struct mwifiex_uap_bss_param *config)
{
	config->bcast_ssid_ctl = 0x7F;
	config->radio_ctl = 0x7F;
	config->dtim_period = 0x7F;
	config->beacon_period = 0x7FFF;
	config->auth_mode = 0x7F;
	config->rts_threshold = 0x7FFF;
	config->frag_threshold = 0x7FFF;
	config->retry_limit = 0x7F;
}

/* This function parses BSS related parameters from structure
 * and prepares TLVs. These TLVs are appended to command buffer.
*/
static int
mwifiex_uap_bss_param_prepare(u8 *tlv, void *cmd_buf, u16 *param_size)
{
	struct host_cmd_tlv_dtim_period *dtim_period;
	struct host_cmd_tlv_beacon_period *beacon_period;
	struct host_cmd_tlv_ssid *ssid;
	struct host_cmd_tlv_bcast_ssid *bcast_ssid;
	struct host_cmd_tlv_channel_band *chan_band;
	struct host_cmd_tlv_frag_threshold *frag_threshold;
	struct host_cmd_tlv_rts_threshold *rts_threshold;
	struct host_cmd_tlv_retry_limit *retry_limit;
	struct host_cmd_tlv_pwk_cipher *pwk_cipher;
	struct host_cmd_tlv_gwk_cipher *gwk_cipher;
	struct host_cmd_tlv_encrypt_protocol *encrypt_protocol;
	struct host_cmd_tlv_auth_type *auth_type;
	struct host_cmd_tlv_passphrase *passphrase;
	struct host_cmd_tlv_akmp *tlv_akmp;
	struct mwifiex_uap_bss_param *bss_cfg = cmd_buf;
	u16 cmd_size = *param_size;

	if (bss_cfg->ssid.ssid_len) {
		ssid = (struct host_cmd_tlv_ssid *)tlv;
		ssid->tlv.type = cpu_to_le16(TLV_TYPE_UAP_SSID);
		ssid->tlv.len = cpu_to_le16((u16)bss_cfg->ssid.ssid_len);
		memcpy(ssid->ssid, bss_cfg->ssid.ssid, bss_cfg->ssid.ssid_len);
		cmd_size += sizeof(struct host_cmd_tlv) +
			    bss_cfg->ssid.ssid_len;
		tlv += sizeof(struct host_cmd_tlv) + bss_cfg->ssid.ssid_len;

		bcast_ssid = (struct host_cmd_tlv_bcast_ssid *)tlv;
		bcast_ssid->tlv.type = cpu_to_le16(TLV_TYPE_UAP_BCAST_SSID);
		bcast_ssid->tlv.len =
				cpu_to_le16(sizeof(bcast_ssid->bcast_ctl));
		bcast_ssid->bcast_ctl = bss_cfg->bcast_ssid_ctl;
		cmd_size += sizeof(struct host_cmd_tlv_bcast_ssid);
		tlv += sizeof(struct host_cmd_tlv_bcast_ssid);
	}
	if (bss_cfg->channel && bss_cfg->channel <= MAX_CHANNEL_BAND_BG) {
		chan_band = (struct host_cmd_tlv_channel_band *)tlv;
		chan_band->tlv.type = cpu_to_le16(TLV_TYPE_CHANNELBANDLIST);
		chan_band->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_channel_band) -
				    sizeof(struct host_cmd_tlv));
		chan_band->band_config = bss_cfg->band_cfg;
		chan_band->channel = bss_cfg->channel;
		cmd_size += sizeof(struct host_cmd_tlv_channel_band);
		tlv += sizeof(struct host_cmd_tlv_channel_band);
	}
	if (bss_cfg->beacon_period >= MIN_BEACON_PERIOD &&
	    bss_cfg->beacon_period <= MAX_BEACON_PERIOD) {
		beacon_period = (struct host_cmd_tlv_beacon_period *)tlv;
		beacon_period->tlv.type =
					cpu_to_le16(TLV_TYPE_UAP_BEACON_PERIOD);
		beacon_period->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_beacon_period) -
				    sizeof(struct host_cmd_tlv));
		beacon_period->period = cpu_to_le16(bss_cfg->beacon_period);
		cmd_size += sizeof(struct host_cmd_tlv_beacon_period);
		tlv += sizeof(struct host_cmd_tlv_beacon_period);
	}
	if (bss_cfg->dtim_period >= MIN_DTIM_PERIOD &&
	    bss_cfg->dtim_period <= MAX_DTIM_PERIOD) {
		dtim_period = (struct host_cmd_tlv_dtim_period *)tlv;
		dtim_period->tlv.type = cpu_to_le16(TLV_TYPE_UAP_DTIM_PERIOD);
		dtim_period->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_dtim_period) -
				    sizeof(struct host_cmd_tlv));
		dtim_period->period = bss_cfg->dtim_period;
		cmd_size += sizeof(struct host_cmd_tlv_dtim_period);
		tlv += sizeof(struct host_cmd_tlv_dtim_period);
	}
	if (bss_cfg->rts_threshold <= MWIFIEX_RTS_MAX_VALUE) {
		rts_threshold = (struct host_cmd_tlv_rts_threshold *)tlv;
		rts_threshold->tlv.type =
					cpu_to_le16(TLV_TYPE_UAP_RTS_THRESHOLD);
		rts_threshold->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_rts_threshold) -
				    sizeof(struct host_cmd_tlv));
		rts_threshold->rts_thr = cpu_to_le16(bss_cfg->rts_threshold);
		cmd_size += sizeof(struct host_cmd_tlv_frag_threshold);
		tlv += sizeof(struct host_cmd_tlv_frag_threshold);
	}
	if ((bss_cfg->frag_threshold >= MWIFIEX_FRAG_MIN_VALUE) &&
	    (bss_cfg->frag_threshold <= MWIFIEX_FRAG_MAX_VALUE)) {
		frag_threshold = (struct host_cmd_tlv_frag_threshold *)tlv;
		frag_threshold->tlv.type =
				cpu_to_le16(TLV_TYPE_UAP_FRAG_THRESHOLD);
		frag_threshold->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_frag_threshold) -
				    sizeof(struct host_cmd_tlv));
		frag_threshold->frag_thr = cpu_to_le16(bss_cfg->frag_threshold);
		cmd_size += sizeof(struct host_cmd_tlv_frag_threshold);
		tlv += sizeof(struct host_cmd_tlv_frag_threshold);
	}
	if (bss_cfg->retry_limit <= MWIFIEX_RETRY_LIMIT) {
		retry_limit = (struct host_cmd_tlv_retry_limit *)tlv;
		retry_limit->tlv.type = cpu_to_le16(TLV_TYPE_UAP_RETRY_LIMIT);
		retry_limit->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_retry_limit) -
				    sizeof(struct host_cmd_tlv));
		retry_limit->limit = (u8)bss_cfg->retry_limit;
		cmd_size += sizeof(struct host_cmd_tlv_retry_limit);
		tlv += sizeof(struct host_cmd_tlv_retry_limit);
	}
	if ((bss_cfg->protocol & PROTOCOL_WPA) ||
	    (bss_cfg->protocol & PROTOCOL_WPA2) ||
	    (bss_cfg->protocol & PROTOCOL_EAP)) {
		tlv_akmp = (struct host_cmd_tlv_akmp *)tlv;
		tlv_akmp->tlv.type = cpu_to_le16(TLV_TYPE_UAP_AKMP);
		tlv_akmp->tlv.len =
		    cpu_to_le16(sizeof(struct host_cmd_tlv_akmp) -
				sizeof(struct host_cmd_tlv));
		tlv_akmp->key_mgmt_operation =
			cpu_to_le16(bss_cfg->key_mgmt_operation);
		tlv_akmp->key_mgmt = cpu_to_le16(bss_cfg->key_mgmt);
		cmd_size += sizeof(struct host_cmd_tlv_akmp);
		tlv += sizeof(struct host_cmd_tlv_akmp);

		if (bss_cfg->wpa_cfg.pairwise_cipher_wpa &
				VALID_CIPHER_BITMAP) {
			pwk_cipher = (struct host_cmd_tlv_pwk_cipher *)tlv;
			pwk_cipher->tlv.type =
				cpu_to_le16(TLV_TYPE_PWK_CIPHER);
			pwk_cipher->tlv.len = cpu_to_le16(
				sizeof(struct host_cmd_tlv_pwk_cipher) -
				sizeof(struct host_cmd_tlv));
			pwk_cipher->proto = cpu_to_le16(PROTOCOL_WPA);
			pwk_cipher->cipher =
				bss_cfg->wpa_cfg.pairwise_cipher_wpa;
			cmd_size += sizeof(struct host_cmd_tlv_pwk_cipher);
			tlv += sizeof(struct host_cmd_tlv_pwk_cipher);
		}
		if (bss_cfg->wpa_cfg.pairwise_cipher_wpa2 &
				VALID_CIPHER_BITMAP) {
			pwk_cipher = (struct host_cmd_tlv_pwk_cipher *)tlv;
			pwk_cipher->tlv.type = cpu_to_le16(TLV_TYPE_PWK_CIPHER);
			pwk_cipher->tlv.len = cpu_to_le16(
				sizeof(struct host_cmd_tlv_pwk_cipher) -
				sizeof(struct host_cmd_tlv));
			pwk_cipher->proto = cpu_to_le16(PROTOCOL_WPA2);
			pwk_cipher->cipher =
				bss_cfg->wpa_cfg.pairwise_cipher_wpa2;
			cmd_size += sizeof(struct host_cmd_tlv_pwk_cipher);
			tlv += sizeof(struct host_cmd_tlv_pwk_cipher);
		}
		if (bss_cfg->wpa_cfg.group_cipher & VALID_CIPHER_BITMAP) {
			gwk_cipher = (struct host_cmd_tlv_gwk_cipher *)tlv;
			gwk_cipher->tlv.type = cpu_to_le16(TLV_TYPE_GWK_CIPHER);
			gwk_cipher->tlv.len = cpu_to_le16(
				sizeof(struct host_cmd_tlv_gwk_cipher) -
				sizeof(struct host_cmd_tlv));
			gwk_cipher->cipher = bss_cfg->wpa_cfg.group_cipher;
			cmd_size += sizeof(struct host_cmd_tlv_gwk_cipher);
			tlv += sizeof(struct host_cmd_tlv_gwk_cipher);
		}
		if (bss_cfg->wpa_cfg.length) {
			passphrase = (struct host_cmd_tlv_passphrase *)tlv;
			passphrase->tlv.type =
				cpu_to_le16(TLV_TYPE_UAP_WPA_PASSPHRASE);
			passphrase->tlv.len =
				cpu_to_le16(bss_cfg->wpa_cfg.length);
			memcpy(passphrase->passphrase,
			       bss_cfg->wpa_cfg.passphrase,
			       bss_cfg->wpa_cfg.length);
			cmd_size += sizeof(struct host_cmd_tlv) +
				    bss_cfg->wpa_cfg.length;
			tlv += sizeof(struct host_cmd_tlv) +
			       bss_cfg->wpa_cfg.length;
		}
	}
	if ((bss_cfg->auth_mode <= WLAN_AUTH_SHARED_KEY) ||
	    (bss_cfg->auth_mode == MWIFIEX_AUTH_MODE_AUTO)) {
		auth_type = (struct host_cmd_tlv_auth_type *)tlv;
		auth_type->tlv.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
		auth_type->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_auth_type) -
			sizeof(struct host_cmd_tlv));
		auth_type->auth_type = (u8)bss_cfg->auth_mode;
		cmd_size += sizeof(struct host_cmd_tlv_auth_type);
		tlv += sizeof(struct host_cmd_tlv_auth_type);
	}
	if (bss_cfg->protocol) {
		encrypt_protocol = (struct host_cmd_tlv_encrypt_protocol *)tlv;
		encrypt_protocol->tlv.type =
			cpu_to_le16(TLV_TYPE_UAP_ENCRY_PROTOCOL);
		encrypt_protocol->tlv.len =
			cpu_to_le16(sizeof(struct host_cmd_tlv_encrypt_protocol)
			- sizeof(struct host_cmd_tlv));
		encrypt_protocol->proto = cpu_to_le16(bss_cfg->protocol);
		cmd_size += sizeof(struct host_cmd_tlv_encrypt_protocol);
		tlv += sizeof(struct host_cmd_tlv_encrypt_protocol);
	}

	*param_size = cmd_size;

	return 0;
}

/* This function parses custom IEs from IE list and prepares command buffer */
static int mwifiex_uap_custom_ie_prepare(u8 *tlv, void *cmd_buf, u16 *ie_size)
{
	struct mwifiex_ie_list *ap_ie = cmd_buf;
	struct host_cmd_tlv *tlv_ie = (struct host_cmd_tlv *)tlv;

	if (!ap_ie || !ap_ie->len || !ap_ie->ie_list)
		return -1;

	*ie_size += le16_to_cpu(ap_ie->len) + sizeof(struct host_cmd_tlv);

	tlv_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
	tlv_ie->len = ap_ie->len;
	tlv += sizeof(struct host_cmd_tlv);

	memcpy(tlv, ap_ie->ie_list, le16_to_cpu(ap_ie->len));

	return 0;
}

/* Parse AP config structure and prepare TLV based command structure
 * to be sent to FW for uAP configuration
 */
static int
mwifiex_cmd_uap_sys_config(struct host_cmd_ds_command *cmd, u16 cmd_action,
			   u32 type, void *cmd_buf)
{
	u8 *tlv;
	u16 cmd_size, param_size, ie_size;
	struct host_cmd_ds_sys_config *sys_cfg;

	cmd->command = cpu_to_le16(HostCmd_CMD_UAP_SYS_CONFIG);
	cmd_size = (u16)(sizeof(struct host_cmd_ds_sys_config) + S_DS_GEN);
	sys_cfg = (struct host_cmd_ds_sys_config *)&cmd->params.uap_sys_config;
	sys_cfg->action = cpu_to_le16(cmd_action);
	tlv = sys_cfg->tlv;

	switch (type) {
	case UAP_BSS_PARAMS_I:
		param_size = cmd_size;
		if (mwifiex_uap_bss_param_prepare(tlv, cmd_buf, &param_size))
			return -1;
		cmd->size = cpu_to_le16(param_size);
		break;
	case UAP_CUSTOM_IE_I:
		ie_size = cmd_size;
		if (mwifiex_uap_custom_ie_prepare(tlv, cmd_buf, &ie_size))
			return -1;
		cmd->size = cpu_to_le16(ie_size);
		break;
	default:
		return -1;
	}

	return 0;
}

/* This function prepares the AP specific commands before sending them
 * to the firmware.
 * This is a generic function which calls specific command preparation
 * routines based upon the command number.
 */
int mwifiex_uap_prepare_cmd(struct mwifiex_private *priv, u16 cmd_no,
			    u16 cmd_action, u32 type,
			    void *data_buf, void *cmd_buf)
{
	struct host_cmd_ds_command *cmd = cmd_buf;

	switch (cmd_no) {
	case HostCmd_CMD_UAP_SYS_CONFIG:
		if (mwifiex_cmd_uap_sys_config(cmd, cmd_action, type, data_buf))
			return -1;
		break;
	case HostCmd_CMD_UAP_BSS_START:
	case HostCmd_CMD_UAP_BSS_STOP:
		cmd->command = cpu_to_le16(cmd_no);
		cmd->size = cpu_to_le16(S_DS_GEN);
		break;
	default:
		dev_err(priv->adapter->dev,
			"PREP_CMD: unknown cmd %#x\n", cmd_no);
		return -1;
	}

	return 0;
}

/* This function sets the RF channel for AP.
 *
 * This function populates channel information in AP config structure
 * and sends command to configure channel information in AP.
 */
int mwifiex_uap_set_channel(struct mwifiex_private *priv, int channel)
{
	struct mwifiex_uap_bss_param *bss_cfg;
	struct wiphy *wiphy = priv->wdev->wiphy;

	bss_cfg = kzalloc(sizeof(struct mwifiex_uap_bss_param), GFP_KERNEL);
	if (!bss_cfg)
		return -ENOMEM;

	mwifiex_set_sys_config_invalid_data(bss_cfg);
	bss_cfg->band_cfg = BAND_CONFIG_MANUAL;
	bss_cfg->channel = channel;

	if (mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
				   HostCmd_ACT_GEN_SET,
				   UAP_BSS_PARAMS_I, bss_cfg)) {
		wiphy_err(wiphy, "Failed to set the uAP channel\n");
		kfree(bss_cfg);
		return -1;
	}

	kfree(bss_cfg);
	return 0;
}