コード例 #1
0
/**
 * iwlagn_commit_rxon - commit staging_rxon to hardware
 *
 * The RXON command in staging_rxon is committed 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.
 */
int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	/* cast away the const for active_rxon in this function */
	struct iwl_rxon_cmd *active = (void *)&ctx->active;
	bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
	bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
	int ret;

	lockdep_assert_held(&priv->mutex);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return -EINVAL;

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

	/* This function hardcodes a bunch of dual-mode assumptions */
	BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);

	if (!ctx->is_active)
		return 0;

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

	if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
		struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;

		iwl_set_rxon_channel(priv, chan, ctx);
		iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
		ctx->staging.filter_flags |=
			RXON_FILTER_ASSOC_MSK |
			RXON_FILTER_PROMISC_MSK |
			RXON_FILTER_CTL2HOST_MSK;
		ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
		new_assoc = true;

		if (memcmp(&ctx->staging, &ctx->active,
			   sizeof(ctx->staging)) == 0)
			return 0;
	}

	if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
	    !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
		ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
	else
		ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

	ret = iwl_check_rxon_cmd(priv, ctx);
	if (ret) {
		IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
		return -EINVAL;
	}

	/*
	 * receive commit_rxon request
	 * abort any previous channel switch if still in process
	 */
	if (priv->switch_rxon.switch_in_progress &&
	    (priv->switch_rxon.channel != ctx->staging.channel)) {
		IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
		      le16_to_cpu(priv->switch_rxon.channel));
		iwl_chswitch_done(priv, false);
	}

	/*
	 * 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, ctx)) {
		ret = iwl_send_rxon_assoc(priv, ctx);
		if (ret) {
			IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
			return ret;
		}

		memcpy(active, &ctx->staging, sizeof(*active));
		iwl_print_rx_config_cmd(priv, ctx);
		return 0;
	}

	if (priv->cfg->ops->hcmd->set_pan_params) {
		ret = priv->cfg->ops->hcmd->set_pan_params(priv);
		if (ret)
			return ret;
	}

	iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);

	IWL_DEBUG_INFO(priv,
		       "Going to commit RXON\n"
		       "  * with%s RXON_FILTER_ASSOC_MSK\n"
		       "  * channel = %d\n"
		       "  * bssid = %pM\n",
		       (new_assoc ? "" : "out"),
		       le16_to_cpu(ctx->staging.channel),
		       ctx->staging.bssid_addr);

	/*
	 * Always clear associated first, but with the correct config.
	 * This is required as for example station addition for the
	 * AP station must be done after the BSSID is set to correctly
	 * set up filters in the device.
	 */
	if ((old_assoc && new_assoc) || !new_assoc) {
		if (ctx->ctxid == IWL_RXON_CTX_BSS)
			ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
		else
			ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
		if (ret)
			return ret;

		memcpy(active, &ctx->staging, sizeof(*active));

		/*
		 * Un-assoc RXON clears the station table and WEP
		 * keys, so we have to restore those afterwards.
		 */
		iwl_clear_ucode_stations(priv, ctx);
		iwl_restore_stations(priv, ctx);
		ret = iwl_restore_default_wep_keys(priv, ctx);
		if (ret) {
			IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
			return ret;
		}
	}

	/* RXON timing must be before associated RXON */
	ret = iwl_send_rxon_timing(priv, ctx);
	if (ret) {
		IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
		return ret;
	}

	if (new_assoc) {
		/* QoS info may be cleared by previous un-assoc RXON */
		iwlagn_update_qos(priv, ctx);

		/*
		 * We'll run into this code path when beaconing is
		 * enabled, but then we also need to send the beacon
		 * to the device.
		 */
		if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
			ret = iwlagn_update_beacon(priv, ctx->vif);
			if (ret) {
				IWL_ERR(priv,
					"Error sending required beacon (%d)!\n",
					ret);
				return ret;
			}
		}

		priv->start_calib = 0;
		/*
		 * Apply the new configuration.
		 *
		 * Associated RXON doesn't clear the station table in uCode,
		 * so we don't need to restore stations etc. after this.
		 */
		ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
			      sizeof(struct iwl_rxon_cmd), &ctx->staging);
		if (ret) {
			IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
			return ret;
		}
		memcpy(active, &ctx->staging, sizeof(*active));

		iwl_reprogram_ap_sta(priv, ctx);

		/* IBSS beacon needs to be sent after setting assoc */
		if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
			if (iwlagn_update_beacon(priv, ctx->vif))
				IWL_ERR(priv, "Error sending IBSS beacon\n");
	}

	iwl_print_rx_config_cmd(priv, ctx);

	iwl_init_sensitivity(priv);

	/*
	 * 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.
	 *
	 * It's expected we set power here if channel is changing.
	 */
	ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
	if (ret) {
		IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
		return ret;
	}

	return 0;
}
コード例 #2
0
/**
 * iwlagn_commit_rxon - commit staging_rxon to hardware
 *
 * The RXON command in staging_rxon is committed 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.
 *
 * The connect/disconnect flow should be as the following:
 *
 * 1. make sure send RXON command with association bit unset if not connect
 *	this should include the channel and the band for the candidate
 *	to be connected to
 * 2. Add Station before RXON association with the AP
 * 3. RXON_timing has to send before RXON for connection
 * 4. full RXON command - associated bit set
 * 5. use RXON_ASSOC command to update any flags changes
 */
int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	/* cast away the const for active_rxon in this function */
	struct iwl_rxon_cmd *active = (void *)&ctx->active;
	bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
	int ret;

	lockdep_assert_held(&priv->mutex);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return -EINVAL;

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

	/* This function hardcodes a bunch of dual-mode assumptions */
	BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);

	if (!ctx->is_active)
		return 0;

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

	if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
		struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;

		iwl_set_rxon_channel(priv, chan, ctx);
		iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
		ctx->staging.filter_flags |=
			RXON_FILTER_ASSOC_MSK |
			RXON_FILTER_PROMISC_MSK |
			RXON_FILTER_CTL2HOST_MSK;
		ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
		new_assoc = true;

		if (memcmp(&ctx->staging, &ctx->active,
			   sizeof(ctx->staging)) == 0)
			return 0;
	}

	/*
	 * force CTS-to-self frames protection if RTS-CTS is not preferred
	 * one aggregation protection method
	 */
	if (!(priv->cfg->ht_params &&
	      priv->cfg->ht_params->use_rts_for_aggregation))
		ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;

	if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
	    !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
		ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
	else
		ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

	iwl_print_rx_config_cmd(priv, ctx);
	ret = iwl_check_rxon_cmd(priv, ctx);
	if (ret) {
		IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
		return -EINVAL;
	}

	/*
	 * receive commit_rxon request
	 * abort any previous channel switch if still in process
	 */
	if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
	    (priv->switch_channel != ctx->staging.channel)) {
		IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
			      le16_to_cpu(priv->switch_channel));
		iwl_chswitch_done(priv, false);
	}

	/*
	 * 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, ctx)) {
		ret = iwlagn_send_rxon_assoc(priv, ctx);
		if (ret) {
			IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
			return ret;
		}

		memcpy(active, &ctx->staging, sizeof(*active));
		/*
		 * We do not commit tx power settings while channel changing,
		 * do it now if after settings changed.
		 */
		iwl_set_tx_power(priv, priv->tx_power_next, false);
		return 0;
	}

	if (priv->cfg->ops->hcmd->set_pan_params) {
		ret = priv->cfg->ops->hcmd->set_pan_params(priv);
		if (ret)
			return ret;
	}

	iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);

	IWL_DEBUG_INFO(priv,
		       "Going to commit RXON\n"
		       "  * with%s RXON_FILTER_ASSOC_MSK\n"
		       "  * channel = %d\n"
		       "  * bssid = %pM\n",
		       (new_assoc ? "" : "out"),
		       le16_to_cpu(ctx->staging.channel),
		       ctx->staging.bssid_addr);

	/*
	 * Always clear associated first, but with the correct config.
	 * This is required as for example station addition for the
	 * AP station must be done after the BSSID is set to correctly
	 * set up filters in the device.
	 */
	ret = iwlagn_rxon_disconn(priv, ctx);
	if (ret)
		return ret;

	if (new_assoc)
		return iwlagn_rxon_connect(priv, ctx);

	return 0;
}