iwl4965-base.c

linux内核源码

		IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
		return -1;
	}
	return 0;
}

/**
 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 * @priv: staging_rxon is comapred to active_rxon
 *
 * If the RXON structure is changing sufficient to require a new
 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 * to indicate a new tune is required.
 */
static int iwl_full_rxon_required(struct iwl_priv *priv)
{

	/* These items are only settable from the full RXON command */
	if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
	    compare_ether_addr(priv->staging_rxon.bssid_addr,
			       priv->active_rxon.bssid_addr) ||
	    compare_ether_addr(priv->staging_rxon.node_addr,
			       priv->active_rxon.node_addr) ||
	    compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
			       priv->active_rxon.wlap_bssid_addr) ||
	    (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
	    (priv->staging_rxon.channel != priv->active_rxon.channel) ||
	    (priv->staging_rxon.air_propagation !=
	     priv->active_rxon.air_propagation) ||
	    (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
	    (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
	    (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
	    (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
		return 1;

	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
	 * be updated with the RXON_ASSOC command -- however only some
	 * flag transitions are allowed using RXON_ASSOC */

	/* Check if we are not switching bands */
	if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
	    (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
		return 1;

	/* Check if we are switching association toggle */
	if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
		(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
		return 1;

	return 0;
}

static int iwl_send_rxon_assoc(struct iwl_priv *priv)
{
	int rc = 0;
	struct iwl_rx_packet *res = NULL;
	struct iwl_rxon_assoc_cmd rxon_assoc;
	struct iwl_host_cmd cmd = {
		.id = REPLY_RXON_ASSOC,
		.len = sizeof(rxon_assoc),
		.meta.flags = CMD_WANT_SKB,
		.data = &rxon_assoc,
	};
	const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
	const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;

	if ((rxon1->flags == rxon2->flags) &&
	    (rxon1->filter_flags == rxon2->filter_flags) &&
	    (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
	    (rxon1->ofdm_ht_single_stream_basic_rates ==
	     rxon2->ofdm_ht_single_stream_basic_rates) &&
	    (rxon1->ofdm_ht_dual_stream_basic_rates ==
	     rxon2->ofdm_ht_dual_stream_basic_rates) &&
	    (rxon1->rx_chain == rxon2->rx_chain) &&
	    (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
		IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
		return 0;
	}

	rxon_assoc.flags = priv->staging_rxon.flags;
	rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
	rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
	rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
	rxon_assoc.reserved = 0;
	rxon_assoc.ofdm_ht_single_stream_basic_rates =
	    priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
	rxon_assoc.ofdm_ht_dual_stream_basic_rates =
	    priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
	rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;

	rc = iwl_send_cmd_sync(priv, &cmd);
	if (rc)
		return rc;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
		rc = -EIO;
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

/**
 * iwl_commit_rxon - commit staging_rxon to hardware
 *
 * The RXON command in staging_rxon is commited to the hardware and
 * the active_rxon structure is updated with the new data.  This
 * function correctly transitions out of the RXON_ASSOC_MSK state if
 * a HW tune is required based on the RXON structure changes.
 */
static int iwl_commit_rxon(struct iwl_priv *priv)
{
	/* cast away the const for active_rxon in this function */
	struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
	DECLARE_MAC_BUF(mac);
	int rc = 0;

	if (!iwl_is_alive(priv))
		return -1;

	/* always get timestamp with Rx frame */
	priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;

	rc = iwl_check_rxon_cmd(&priv->staging_rxon);
	if (rc) {
		IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
		return -EINVAL;
	}

	/* If we don't need to send a full RXON, we can use
	 * iwl_rxon_assoc_cmd which is used to reconfigure filter
	 * and other flags for the current radio configuration. */
	if (!iwl_full_rxon_required(priv)) {
		rc = iwl_send_rxon_assoc(priv);
		if (rc) {
			IWL_ERROR("Error setting RXON_ASSOC "
				  "configuration (%d).\n", rc);
			return rc;
		}

		memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));

		return 0;
	}

	/* station table will be cleared */
	priv->assoc_station_added = 0;

#ifdef CONFIG_IWLWIFI_SENSITIVITY
	priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
	if (!priv->error_recovering)
		priv->start_calib = 0;

	iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
#endif /* CONFIG_IWLWIFI_SENSITIVITY */

	/* If we are currently associated and the new config requires
	 * an RXON_ASSOC and the new config wants the associated mask enabled,
	 * we must clear the associated from the active configuration
	 * before we apply the new config */
	if (iwl_is_associated(priv) &&
	    (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
		IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;

		rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
				      sizeof(struct iwl_rxon_cmd),
				      &priv->active_rxon);

		/* If the mask clearing failed then we set
		 * active_rxon back to what it was previously */
		if (rc) {
			active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
			IWL_ERROR("Error clearing ASSOC_MSK on current "
				  "configuration (%d).\n", rc);
			return rc;
		}
	}

	IWL_DEBUG_INFO("Sending RXON\n"
		       "* with%s RXON_FILTER_ASSOC_MSK\n"
		       "* channel = %d\n"
		       "* bssid = %s\n",
		       ((priv->staging_rxon.filter_flags &
			 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
		       le16_to_cpu(priv->staging_rxon.channel),
		       print_mac(mac, priv->staging_rxon.bssid_addr));

	/* Apply the new configuration */
	rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
			      sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
	if (rc) {
		IWL_ERROR("Error setting new configuration (%d).\n", rc);
		return rc;
	}

	iwl_clear_stations_table(priv);

#ifdef CONFIG_IWLWIFI_SENSITIVITY
	if (!priv->error_recovering)
		priv->start_calib = 0;

	priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
	iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
#endif /* CONFIG_IWLWIFI_SENSITIVITY */

	memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));

	/* If we issue a new RXON command which required a tune then we must
	 * send a new TXPOWER command or we won't be able to Tx any frames */
	rc = iwl_hw_reg_send_txpower(priv);
	if (rc) {
		IWL_ERROR("Error setting Tx power (%d).\n", rc);
		return rc;
	}

	/* Add the broadcast address so we can send broadcast frames */
	if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
	    IWL_INVALID_STATION) {
		IWL_ERROR("Error adding BROADCAST address for transmit.\n");
		return -EIO;
	}

	/* If we have set the ASSOC_MSK and we are in BSS mode then
	 * add the IWL_AP_ID to the station rate table */
	if (iwl_is_associated(priv) &&
	    (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
		if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
		    == IWL_INVALID_STATION) {
			IWL_ERROR("Error adding AP address for transmit.\n");
			return -EIO;
		}
		priv->assoc_station_added = 1;
	}

	return 0;
}

static int iwl_send_bt_config(struct iwl_priv *priv)
{
	struct iwl_bt_cmd bt_cmd = {
		.flags = 3,
		.lead_time = 0xAA,
		.max_kill = 1,
		.kill_ack_mask = 0,
		.kill_cts_mask = 0,
	};

	return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
				sizeof(struct iwl_bt_cmd), &bt_cmd);
}

static int iwl_send_scan_abort(struct iwl_priv *priv)
{
	int rc = 0;
	struct iwl_rx_packet *res;
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_ABORT_CMD,
		.meta.flags = CMD_WANT_SKB,
	};

	/* If there isn't a scan actively going on in the hardware
	 * then we are in between scan bands and not actually
	 * actively scanning, so don't send the abort command */
	if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		return 0;
	}

	rc = iwl_send_cmd_sync(priv, &cmd);
	if (rc) {
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		return rc;
	}

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->u.status != CAN_ABORT_STATUS) {
		/* The scan abort will return 1 for success or
		 * 2 for "failure".  A failure condition can be
		 * due to simply not being in an active scan which
		 * can occur if we send the scan abort before we
		 * the microcode has notified us that a scan is
		 * completed. */
		IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
		clear_bit(STATUS_SCAN_HW, &priv->status);
	}

	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

static int iwl_card_state_sync_callback(struct iwl_priv *priv,
					struct iwl_cmd *cmd,
					struct sk_buff *skb)
{
	return 1;
}

/*
 * CARD_STATE_CMD
 *
 * Use: Sets the internal card state to enable, disable, or halt
 *
 * When in the 'enable' state the card operates as normal.
 * When in the 'disable' state, the card enters into a low power mode.
 * When in the 'halt' state, the card is shut down and must be fully
 * restarted to come back on.
 */
static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
{
	struct iwl_host_cmd cmd = {
		.id = REPLY_CARD_STATE_CMD,
		.len = sizeof(u32),
		.data = &flags,
		.meta.flags = meta_flag,
	};

	if (meta_flag & CMD_ASYNC)
		cmd.meta.u.callback = iwl_card_state_sync_callback;

	return iwl_send_cmd(priv, &cmd);
}

static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
				     struct iwl_cmd *cmd, struct sk_buff *skb)
{
	struct iwl_rx_packet *res = NULL;

	if (!skb) {
		IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
		return 1;
	}

	res = (struct iwl_rx_packet *)skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		return 1;
	}

	switch (res->u.add_sta.status) {
	case ADD_STA_SUCCESS_MSK:
		break;
	default:
		break;
	}

	/* We didn't cache the SKB; let the caller free it */
	return 1;
}

int iwl_send_add_station(struct iwl_priv *priv,
			 struct iwl_addsta_cmd *sta, u8 flags)
{
	struct iwl_rx_packet *res = NULL;
	int rc = 0;
	struct iwl_host_cmd cmd = {
		.id = REPLY_ADD_STA,
		.len = sizeof(struct iwl_addsta_cmd),
		.meta.flags = flags,
		.data = sta,
	};

	if (flags & CMD_ASYNC)
		cmd.meta.u.callback = iwl_add_sta_sync_callback;
	else
		cmd.meta.flags |= CMD_WANT_SKB;

	rc = iwl_send_cmd(priv, &cmd);

	if (rc || (flags & CMD_ASYNC))
		return rc;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		rc = -EIO;
	}

	if (rc == 0) {
		switch (res->u.add_sta.status) {
		case ADD_STA_SUCCESS_MSK:
			IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
			break;
		default:
			rc = -EIO;
			IWL_WARNING("REPLY_ADD_STA failed\n");
			break;
		}
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return rc;
}

static int iwl_update_sta_key_info(struct iwl_priv *priv,
				   struct ieee80211_key_conf *keyconf,
				   u8 sta_id)
{
	unsigned long flags;
	__le16 key_flags = 0;

	switch (keyconf->alg) {
	case ALG_CCMP:
		key_flags |= STA_KEY_FLG_CCMP;
		key_flags |= cpu_to_le16(
				keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
		key_flags &= ~STA_KEY_FLG_INVALID;
		break;
	case ALG_TKIP:
	case ALG_WEP:
		return -EINVAL;
	default:
		return -EINVAL;
	}
	spin_lock_irqsave(&priv->sta_lock, flags);
	priv->stations[sta_id].keyinfo.alg = keyconf->alg;
	priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
	memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
	       keyconf->keylen);

	memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
	       keyconf->keylen);
	priv->stations[sta_id].sta.key.key_flags = key_flags;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
	iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
	return 0;
}

static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);
	memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
	memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
	priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
	iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
	return 0;
}

static void iwl_clear_free_frames(struct iwl_priv *priv)
{
	struct list_head *element;

	IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
		       priv->frames_count);

	while (!list_empty(&priv->free_frames)) {
		element = priv->free_frames.next;
		list_del(element);
		kfree(list_entry(element, struct iwl_frame, list));
		priv->frames_count--;
	}

	if (priv->frames_count) {
		IWL_WARNING("%d frames still in use.  Did we lose one?\n",
			    priv->frames_count);
		priv->frames_count = 0;
	}
}