ops.c 41.4 KB
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/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
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 * in the file called COPYING.
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 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <net/mac80211.h>

#include "iwl-notif-wait.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-fw.h"
#include "iwl-debug.h"
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "mvm.h"
#include "iwl-phy-db.h"
#include "iwl-eeprom-parse.h"
#include "iwl-csr.h"
#include "iwl-io.h"
#include "iwl-prph.h"
#include "rs.h"
#include "fw-api-scan.h"
#include "time-event.h"
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#include "fw-dbg.h"
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#define DRV_DESCRIPTION	"The new Intel(R) wireless AGN driver for Linux"
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");

static const struct iwl_op_mode_ops iwl_mvm_ops;
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static const struct iwl_op_mode_ops iwl_mvm_ops_mq;
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struct iwl_mvm_mod_params iwlmvm_mod_params = {
	.power_scheme = IWL_POWER_SCHEME_BPS,
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	.tfd_q_hang_detect = true
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	/* rest of fields are 0 by default */
};

module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
MODULE_PARM_DESC(init_dbg,
		 "set to true to debug an ASSERT in INIT fw (default: false");
module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
MODULE_PARM_DESC(power_scheme,
		 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
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module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
		   bool, S_IRUGO);
MODULE_PARM_DESC(tfd_q_hang_detect,
		 "TFD queues hang detection (default: true");
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/*
 * module init and exit functions
 */
static int __init iwl_mvm_init(void)
{
	int ret;

	ret = iwl_mvm_rate_control_register();
	if (ret) {
		pr_err("Unable to register rate control algorithm: %d\n", ret);
		return ret;
	}

	ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);

	if (ret) {
		pr_err("Unable to register MVM op_mode: %d\n", ret);
		iwl_mvm_rate_control_unregister();
	}

	return ret;
}
module_init(iwl_mvm_init);

static void __exit iwl_mvm_exit(void)
{
	iwl_opmode_deregister("iwlmvm");
	iwl_mvm_rate_control_unregister();
}
module_exit(iwl_mvm_exit);

static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
	u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
	u32 reg_val = 0;
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	u32 phy_config = iwl_mvm_get_phy_config(mvm);

	radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
			 FW_PHY_CFG_RADIO_TYPE_POS;
	radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
			 FW_PHY_CFG_RADIO_STEP_POS;
	radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
			 FW_PHY_CFG_RADIO_DASH_POS;
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	/* SKU control */
	reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
				CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
	reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
				CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;

	/* radio configuration */
	reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
	reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
	reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;

	WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
		 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);

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	/*
	 * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
	 * shouldn't be set to any non-zero value. The same is supposed to be
	 * true of the other HW, but unsetting them (such as the 7260) causes
	 * automatic tests to fail on seemingly unrelated errors. Need to
	 * further investigate this, but for now we'll separate cases.
	 */
	if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
		reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
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	iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
				CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
				CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
				CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
				CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
				CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
				CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
				CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
				reg_val);
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	IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
		       radio_cfg_step, radio_cfg_dash);

	/*
	 * W/A : NIC is stuck in a reset state after Early PCIe power off
	 * (PCIe power is lost before PERST# is asserted), causing ME FW
	 * to lose ownership and not being able to obtain it back.
	 */
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	if (!mvm->trans->cfg->apmg_not_supported)
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		iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
				       APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
				       ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
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}

struct iwl_rx_handlers {
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	u16 cmd_id;
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	bool async;
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	void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
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};

#define RX_HANDLER(_cmd_id, _fn, _async)	\
	{ .cmd_id = _cmd_id , .fn = _fn , .async = _async }
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#define RX_HANDLER_GRP(_grp, _cmd, _fn, _async)	\
	{ .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
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/*
 * Handlers for fw notifications
 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 * This list should be in order of frequency for performance purposes.
 *
 * The handler can be SYNC - this means that it will be called in the Rx path
 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 * only in this case!), it should be set as ASYNC. In that case, it will be
 * called from a worker with mvm->mutex held.
 */
static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
	RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
	RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),

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	RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
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	RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
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	RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
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	RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
		   iwl_mvm_rx_ant_coupling_notif, true),
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	RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
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	RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
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	RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),

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	RX_HANDLER(SCAN_ITERATION_COMPLETE,
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		   iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
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	RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
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		   iwl_mvm_rx_lmac_scan_complete_notif, true),
	RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
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		   false),
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	RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
		   true),
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	RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
		   iwl_mvm_rx_umac_scan_iter_complete_notif, false),
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	RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),

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	RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
		   false),

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	RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
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	RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
		   iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
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	RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
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	RX_HANDLER_GRP(PHY_OPS_GROUP, DTS_MEASUREMENT_NOTIF_WIDE,
		       iwl_mvm_temp_notif, true),
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	RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
		   true),
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	RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
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	RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
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};
#undef RX_HANDLER
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#undef RX_HANDLER_GRP
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#define CMD(x) [x] = #x

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static const char *const iwl_mvm_cmd_strings[REPLY_MAX + 1] = {
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	CMD(MVM_ALIVE),
	CMD(REPLY_ERROR),
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	CMD(ECHO_CMD),
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	CMD(INIT_COMPLETE_NOTIF),
	CMD(PHY_CONTEXT_CMD),
	CMD(MGMT_MCAST_KEY),
	CMD(TX_CMD),
	CMD(TXPATH_FLUSH),
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	CMD(SHARED_MEM_CFG),
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	CMD(MAC_CONTEXT_CMD),
	CMD(TIME_EVENT_CMD),
	CMD(TIME_EVENT_NOTIFICATION),
	CMD(BINDING_CONTEXT_CMD),
	CMD(TIME_QUOTA_CMD),
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	CMD(NON_QOS_TX_COUNTER_CMD),
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	CMD(DC2DC_CONFIG_CMD),
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	CMD(NVM_ACCESS_CMD),
	CMD(PHY_CONFIGURATION_CMD),
	CMD(CALIB_RES_NOTIF_PHY_DB),
	CMD(SET_CALIB_DEFAULT_CMD),
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	CMD(FW_PAGING_BLOCK_CMD),
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	CMD(ADD_STA_KEY),
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	CMD(ADD_STA),
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	CMD(FW_GET_ITEM_CMD),
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	CMD(REMOVE_STA),
	CMD(LQ_CMD),
	CMD(SCAN_OFFLOAD_CONFIG_CMD),
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	CMD(MATCH_FOUND_NOTIFICATION),
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	CMD(SCAN_OFFLOAD_REQUEST_CMD),
	CMD(SCAN_OFFLOAD_ABORT_CMD),
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	CMD(HOT_SPOT_CMD),
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	CMD(SCAN_OFFLOAD_COMPLETE),
	CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
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	CMD(SCAN_ITERATION_COMPLETE),
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	CMD(POWER_TABLE_CMD),
	CMD(WEP_KEY),
	CMD(REPLY_RX_PHY_CMD),
	CMD(REPLY_RX_MPDU_CMD),
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	CMD(BEACON_NOTIFICATION),
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	CMD(BEACON_TEMPLATE_CMD),
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	CMD(STATISTICS_CMD),
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	CMD(STATISTICS_NOTIFICATION),
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	CMD(EOSP_NOTIFICATION),
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	CMD(REDUCE_TX_POWER_CMD),
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	CMD(TX_ANT_CONFIGURATION_CMD),
	CMD(D3_CONFIG_CMD),
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	CMD(D0I3_END_CMD),
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	CMD(PROT_OFFLOAD_CONFIG_CMD),
	CMD(OFFLOADS_QUERY_CMD),
	CMD(REMOTE_WAKE_CONFIG_CMD),
	CMD(WOWLAN_PATTERNS),
	CMD(WOWLAN_CONFIGURATION),
	CMD(WOWLAN_TSC_RSC_PARAM),
	CMD(WOWLAN_TKIP_PARAM),
	CMD(WOWLAN_KEK_KCK_MATERIAL),
	CMD(WOWLAN_GET_STATUSES),
	CMD(WOWLAN_TX_POWER_PER_DB),
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	CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
	CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
	CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
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	CMD(CARD_STATE_NOTIFICATION),
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	CMD(MISSED_BEACONS_NOTIFICATION),
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	CMD(BT_COEX_PRIO_TABLE),
	CMD(BT_COEX_PROT_ENV),
	CMD(BT_PROFILE_NOTIFICATION),
	CMD(BT_CONFIG),
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	CMD(MCAST_FILTER_CMD),
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	CMD(BCAST_FILTER_CMD),
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	CMD(REPLY_SF_CFG_CMD),
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	CMD(REPLY_BEACON_FILTERING_CMD),
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	CMD(CMD_DTS_MEASUREMENT_TRIGGER),
	CMD(DTS_MEASUREMENT_NOTIFICATION),
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	CMD(REPLY_THERMAL_MNG_BACKOFF),
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	CMD(MAC_PM_POWER_TABLE),
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	CMD(LTR_CONFIG),
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	CMD(BT_COEX_CI),
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	CMD(BT_COEX_UPDATE_SW_BOOST),
	CMD(BT_COEX_UPDATE_CORUN_LUT),
	CMD(BT_COEX_UPDATE_REDUCED_TXP),
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	CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
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	CMD(ANTENNA_COUPLING_NOTIFICATION),
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	CMD(SCD_QUEUE_CFG),
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	CMD(SCAN_CFG_CMD),
	CMD(SCAN_REQ_UMAC),
	CMD(SCAN_ABORT_UMAC),
	CMD(SCAN_COMPLETE_UMAC),
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	CMD(TDLS_CHANNEL_SWITCH_CMD),
	CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
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	CMD(TDLS_CONFIG_CMD),
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	CMD(MCC_UPDATE_CMD),
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	CMD(SCAN_ITERATION_COMPLETE_UMAC),
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};
#undef CMD

/* this forward declaration can avoid to export the function */
static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
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static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
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static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
{
	const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;

	if (!pwr_tx_backoff)
		return 0;

	while (pwr_tx_backoff->pwr) {
		if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
			return pwr_tx_backoff->backoff;

		pwr_tx_backoff++;
	}

	return 0;
}

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static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);

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static struct iwl_op_mode *
iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
		      const struct iwl_fw *fw, struct dentry *dbgfs_dir)
{
	struct ieee80211_hw *hw;
	struct iwl_op_mode *op_mode;
	struct iwl_mvm *mvm;
	struct iwl_trans_config trans_cfg = {};
	static const u8 no_reclaim_cmds[] = {
		TX_CMD,
	};
	int err, scan_size;
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	u32 min_backoff;
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	/*
	 * We use IWL_MVM_STATION_COUNT to check the validity of the station
	 * index all over the driver - check that its value corresponds to the
	 * array size.
	 */
	BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);

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	/********************************
	 * 1. Allocating and configuring HW data
	 ********************************/
	hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
				sizeof(struct iwl_mvm),
				&iwl_mvm_hw_ops);
	if (!hw)
		return NULL;

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	if (cfg->max_rx_agg_size)
		hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;

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	if (cfg->max_tx_agg_size)
		hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;

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	op_mode = hw->priv;

	mvm = IWL_OP_MODE_GET_MVM(op_mode);
	mvm->dev = trans->dev;
	mvm->trans = trans;
	mvm->cfg = cfg;
	mvm->fw = fw;
	mvm->hw = hw;

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	if (iwl_mvm_has_new_rx_api(mvm)) {
		op_mode->ops = &iwl_mvm_ops_mq;
	} else {
		op_mode->ops = &iwl_mvm_ops;

		if (WARN_ON(trans->num_rx_queues > 1))
			goto out_free;
	}

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	mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;

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	mvm->aux_queue = 15;
	mvm->first_agg_queue = 16;
	mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
	if (mvm->cfg->base_params->num_of_queues == 16) {
		mvm->aux_queue = 11;
		mvm->first_agg_queue = 12;
	}
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	mvm->sf_state = SF_UNINIT;
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	mvm->cur_ucode = IWL_UCODE_INIT;
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	mutex_init(&mvm->mutex);
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	mutex_init(&mvm->d0i3_suspend_mutex);
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	spin_lock_init(&mvm->async_handlers_lock);
	INIT_LIST_HEAD(&mvm->time_event_list);
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	INIT_LIST_HEAD(&mvm->aux_roc_te_list);
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	INIT_LIST_HEAD(&mvm->async_handlers_list);
	spin_lock_init(&mvm->time_event_lock);
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	spin_lock_init(&mvm->queue_info_lock);
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	INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
	INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
	INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
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	INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
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	INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
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	INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
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	spin_lock_init(&mvm->d0i3_tx_lock);
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	spin_lock_init(&mvm->refs_lock);
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	skb_queue_head_init(&mvm->d0i3_tx);
	init_waitqueue_head(&mvm->d0i3_exit_waitq);

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479 480 481 482 483 484 485 486 487
	SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);

	/*
	 * Populate the state variables that the transport layer needs
	 * to know about.
	 */
	trans_cfg.op_mode = op_mode;
	trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
	trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
	switch (iwlwifi_mod_params.amsdu_size) {
	case IWL_AMSDU_4K:
		trans_cfg.rx_buf_size = IWL_AMSDU_4K;
		break;
	case IWL_AMSDU_8K:
		trans_cfg.rx_buf_size = IWL_AMSDU_8K;
		break;
	case IWL_AMSDU_12K:
		trans_cfg.rx_buf_size = IWL_AMSDU_12K;
		break;
	default:
		pr_err("%s: Unsupported amsdu_size: %d\n", KBUILD_MODNAME,
		       iwlwifi_mod_params.amsdu_size);
		trans_cfg.rx_buf_size = IWL_AMSDU_4K;
	}
503 504
	trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
					       IWL_UCODE_TLV_API_WIDE_CMD_HDR);
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505

506
	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
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507 508 509 510 511
		trans_cfg.bc_table_dword = true;

	trans_cfg.command_names = iwl_mvm_cmd_strings;

	trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
512
	trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
513
	trans_cfg.scd_set_active = true;
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514

515 516
	trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;

517 518
	/* Set a short watchdog for the command queue */
	trans_cfg.cmd_q_wdg_timeout =
519
		iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
520

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521 522 523 524 525 526 527 528 529
	snprintf(mvm->hw->wiphy->fw_version,
		 sizeof(mvm->hw->wiphy->fw_version),
		 "%s", fw->fw_version);

	/* Configure transport layer */
	iwl_trans_configure(mvm->trans, &trans_cfg);

	trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
	trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
530 531 532 533
	trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
	trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
	memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
	       sizeof(trans->dbg_conf_tlv));
534
	trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
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535 536 537 538 539 540 541 542 543 544 545 546 547 548

	/* set up notification wait support */
	iwl_notification_wait_init(&mvm->notif_wait);

	/* Init phy db */
	mvm->phy_db = iwl_phy_db_init(trans);
	if (!mvm->phy_db) {
		IWL_ERR(mvm, "Cannot init phy_db\n");
		goto out_free;
	}

	IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
		 mvm->cfg->name, mvm->trans->hw_rev);

549 550
	min_backoff = calc_min_backoff(trans, cfg);
	iwl_mvm_tt_initialize(mvm, min_backoff);
551 552

	if (iwlwifi_mod_params.nvm_file)
553
		mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
554 555 556
	else
		IWL_DEBUG_EEPROM(mvm->trans->dev,
				 "working without external nvm file\n");
557

558
	if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
559 560 561
		 "not allowing power-up and not having nvm_file\n"))
		goto out_free;

562
	/*
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563
	 * Even if nvm exists in the nvm_file driver should read again the nvm
564 565 566
	 * from the nic because there might be entries that exist in the OTP
	 * and not in the file.
	 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
567
	 */
568
	if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
569
		err = iwl_nvm_init(mvm, false);
570 571
		if (err)
			goto out_free;
572 573 574 575 576 577 578
	} else {
		err = iwl_trans_start_hw(mvm->trans);
		if (err)
			goto out_free;

		mutex_lock(&mvm->mutex);
		err = iwl_run_init_mvm_ucode(mvm, true);
579 580
		if (!err || !iwlmvm_mod_params.init_dbg)
			iwl_trans_stop_device(trans);
581 582 583 584 585 586
		mutex_unlock(&mvm->mutex);
		/* returns 0 if successful, 1 if success but in rfkill */
		if (err < 0 && !iwlmvm_mod_params.init_dbg) {
			IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
			goto out_free;
		}
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	}

589
	scan_size = iwl_mvm_scan_size(mvm);
590

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	mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
	if (!mvm->scan_cmd)
		goto out_free;

595 596 597
	/* Set EBS as successful as long as not stated otherwise by the FW. */
	mvm->last_ebs_successful = true;

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	err = iwl_mvm_mac_setup_register(mvm);
	if (err)
		goto out_free;

	err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
	if (err)
		goto out_unregister;

606 607
	memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));

608
	/* rpm starts with a taken ref. only set the appropriate bit here. */
609
	mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
610

611 612
	iwl_mvm_tof_init(mvm);

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	return op_mode;

 out_unregister:
	ieee80211_unregister_hw(mvm->hw);
617
	iwl_mvm_leds_exit(mvm);
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 out_free:
619
	flush_delayed_work(&mvm->fw_dump_wk);
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	iwl_phy_db_free(mvm->phy_db);
	kfree(mvm->scan_cmd);
622
	if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
623
		iwl_trans_op_mode_leave(trans);
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	ieee80211_free_hw(mvm->hw);
	return NULL;
}

static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
	int i;

	iwl_mvm_leds_exit(mvm);

635 636
	iwl_mvm_tt_exit(mvm);

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	ieee80211_unregister_hw(mvm->hw);

	kfree(mvm->scan_cmd);
640 641
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = NULL;
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642

643 644 645 646
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
	kfree(mvm->d3_resume_sram);
#endif

647
	iwl_trans_op_mode_leave(mvm->trans);
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	iwl_phy_db_free(mvm->phy_db);
	mvm->phy_db = NULL;

	iwl_free_nvm_data(mvm->nvm_data);
653
	for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
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		kfree(mvm->nvm_sections[i].data);

656 657
	iwl_mvm_tof_clean(mvm);

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	ieee80211_free_hw(mvm->hw);
}

struct iwl_async_handler_entry {
	struct list_head list;
	struct iwl_rx_cmd_buffer rxb;
664
	void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
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};

void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
{
	struct iwl_async_handler_entry *entry, *tmp;

	spin_lock_bh(&mvm->async_handlers_lock);
	list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
		iwl_free_rxb(&entry->rxb);
		list_del(&entry->list);
		kfree(entry);
	}
	spin_unlock_bh(&mvm->async_handlers_lock);
}

static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm =
		container_of(wk, struct iwl_mvm, async_handlers_wk);
	struct iwl_async_handler_entry *entry, *tmp;
	struct list_head local_list;

	INIT_LIST_HEAD(&local_list);

	/* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
	mutex_lock(&mvm->mutex);

	/*
	 * Sync with Rx path with a lock. Remove all the entries from this list,
	 * add them to a local one (lock free), and then handle them.
	 */
	spin_lock_bh(&mvm->async_handlers_lock);
	list_splice_init(&mvm->async_handlers_list, &local_list);
	spin_unlock_bh(&mvm->async_handlers_lock);

	list_for_each_entry_safe(entry, tmp, &local_list, list) {
701
		entry->fn(mvm, &entry->rxb);
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		iwl_free_rxb(&entry->rxb);
		list_del(&entry->list);
		kfree(entry);
	}
	mutex_unlock(&mvm->mutex);
}

709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729
static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
					    struct iwl_rx_packet *pkt)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_cmd *cmds_trig;
	int i;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
	cmds_trig = (void *)trig->data;

	if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
		return;

	for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
		/* don't collect on CMD 0 */
		if (!cmds_trig->cmds[i].cmd_id)
			break;

730 731
		if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
		    cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
732 733
			continue;

734
		iwl_mvm_fw_dbg_collect_trig(mvm, trig,
735 736
					    "CMD 0x%02x.%02x received",
					    pkt->hdr.group_id, pkt->hdr.cmd);
737 738 739 740
		break;
	}
}

741 742 743
static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
			      struct iwl_rx_cmd_buffer *rxb,
			      struct iwl_rx_packet *pkt)
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{
745
	int i;
746

747 748
	iwl_mvm_rx_check_trigger(mvm, pkt);

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	/*
	 * Do the notification wait before RX handlers so
	 * even if the RX handler consumes the RXB we have
	 * access to it in the notification wait entry.
	 */
	iwl_notification_wait_notify(&mvm->notif_wait, pkt);

	for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
		const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
758 759
		struct iwl_async_handler_entry *entry;

760
		if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
761 762
			continue;

763 764
		if (!rx_h->async) {
			rx_h->fn(mvm, rxb);
765
			return;
766
		}
767 768 769 770

		entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
		/* we can't do much... */
		if (!entry)
771
			return;
772 773 774 775 776 777 778 779 780 781

		entry->rxb._page = rxb_steal_page(rxb);
		entry->rxb._offset = rxb->_offset;
		entry->rxb._rx_page_order = rxb->_rx_page_order;
		entry->fn = rx_h->fn;
		spin_lock(&mvm->async_handlers_lock);
		list_add_tail(&entry->list, &mvm->async_handlers_list);
		spin_unlock(&mvm->async_handlers_lock);
		schedule_work(&mvm->async_handlers_wk);
		break;
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	}
}

785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814
static void iwl_mvm_rx(struct iwl_op_mode *op_mode,
		       struct napi_struct *napi,
		       struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

	if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
		iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
	else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
		iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
	else
		iwl_mvm_rx_common(mvm, rxb, pkt);
}

static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
			  struct napi_struct *napi,
			  struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

	if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
		iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
	else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
		iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
	else
		iwl_mvm_rx_common(mvm, rxb, pkt);
}

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static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
818 819
	unsigned long mq;
	int q;
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Johannes Berg 已提交
820

821 822 823
	spin_lock_bh(&mvm->queue_info_lock);
	mq = mvm->queue_info[queue].hw_queue_to_mac80211;
	spin_unlock_bh(&mvm->queue_info_lock);
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824

825
	if (WARN_ON_ONCE(!mq))
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826 827
		return;

828 829 830 831 832 833 834 835 836 837
	for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
		if (atomic_inc_return(&mvm->mac80211_queue_stop_count[q]) > 1) {
			IWL_DEBUG_TX_QUEUES(mvm,
					    "queue %d (mac80211 %d) already stopped\n",
					    queue, q);
			continue;
		}

		ieee80211_stop_queue(mvm->hw, q);
	}
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838 839 840 841 842
}

static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
843 844
	unsigned long mq;
	int q;
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Johannes Berg 已提交
845

846 847 848
	spin_lock_bh(&mvm->queue_info_lock);
	mq = mvm->queue_info[queue].hw_queue_to_mac80211;
	spin_unlock_bh(&mvm->queue_info_lock);
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849

850
	if (WARN_ON_ONCE(!mq))
J
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851 852
		return;

853 854 855 856 857 858 859 860 861 862
	for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
		if (atomic_dec_return(&mvm->mac80211_queue_stop_count[q]) > 0) {
			IWL_DEBUG_TX_QUEUES(mvm,
					    "queue %d (mac80211 %d) still stopped\n",
					    queue, q);
			continue;
		}

		ieee80211_wake_queue(mvm->hw, q);
	}
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863 864
}

865 866 867 868 869 870 871 872 873 874
void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
{
	if (state)
		set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
	else
		clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);

	wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
}

875
static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
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Johannes Berg 已提交
876 877
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
878
	bool calibrating = ACCESS_ONCE(mvm->calibrating);
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879 880 881 882 883 884

	if (state)
		set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
	else
		clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);

885
	wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
886

887 888 889 890 891 892 893 894 895
	/* iwl_run_init_mvm_ucode is waiting for results, abort it */
	if (calibrating)
		iwl_abort_notification_waits(&mvm->notif_wait);

	/*
	 * Stop the device if we run OPERATIONAL firmware or if we are in the
	 * middle of the calibrations.
	 */
	return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
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}

static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
	struct ieee80211_tx_info *info;

	info = IEEE80211_SKB_CB(skb);
	iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
	ieee80211_free_txskb(mvm->hw, skb);
}

908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923
struct iwl_mvm_reprobe {
	struct device *dev;
	struct work_struct work;
};

static void iwl_mvm_reprobe_wk(struct work_struct *wk)
{
	struct iwl_mvm_reprobe *reprobe;

	reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
	if (device_reprobe(reprobe->dev))
		dev_err(reprobe->dev, "reprobe failed!\n");
	kfree(reprobe);
	module_put(THIS_MODULE);
}

924 925 926
static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
{
	struct iwl_mvm *mvm =
927
		container_of(work, struct iwl_mvm, fw_dump_wk.work);
928

929 930 931
	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
		return;

932
	mutex_lock(&mvm->mutex);
933 934 935 936 937 938 939 940 941 942

	/* stop recording */
	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
		iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
	} else {
		iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
		/* wait before we collect the data till the DBGC stop */
		udelay(100);
	}

943
	iwl_mvm_fw_error_dump(mvm);
944 945 946

	/* start recording again if the firmware is not crashed */
	WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
E
Emmanuel Grumbach 已提交
947 948
		     mvm->fw->dbg_dest_tlv &&
		     iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
949

950
	mutex_unlock(&mvm->mutex);
951 952

	iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
953 954
}

955
void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
J
Johannes Berg 已提交
956 957 958
{
	iwl_abort_notification_waits(&mvm->notif_wait);

959 960 961 962 963 964 965 966 967 968
	/*
	 * This is a bit racy, but worst case we tell mac80211 about
	 * a stopped/aborted scan when that was already done which
	 * is not a problem. It is necessary to abort any os scan
	 * here because mac80211 requires having the scan cleared
	 * before restarting.
	 * We'll reset the scan_status to NONE in restart cleanup in
	 * the next start() call from mac80211. If restart isn't called
	 * (no fw restart) scan status will stay busy.
	 */
969
	iwl_mvm_report_scan_aborted(mvm);
970

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Johannes Berg 已提交
971 972 973 974 975 976
	/*
	 * If we're restarting already, don't cycle restarts.
	 * If INIT fw asserted, it will likely fail again.
	 * If WoWLAN fw asserted, don't restart either, mac80211
	 * can't recover this since we're already half suspended.
	 */
977
	if (!mvm->restart_fw && fw_error) {
978 979
		iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
					    NULL);
980 981
	} else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
				    &mvm->status)) {
982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
		struct iwl_mvm_reprobe *reprobe;

		IWL_ERR(mvm,
			"Firmware error during reconfiguration - reprobe!\n");

		/*
		 * get a module reference to avoid doing this while unloading
		 * anyway and to avoid scheduling a work with code that's
		 * being removed.
		 */
		if (!try_module_get(THIS_MODULE)) {
			IWL_ERR(mvm, "Module is being unloaded - abort\n");
			return;
		}

		reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
		if (!reprobe) {
			module_put(THIS_MODULE);
			return;
		}
		reprobe->dev = mvm->trans->dev;
		INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
		schedule_work(&reprobe->work);
1005
	} else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
1006 1007 1008
		/* don't let the transport/FW power down */
		iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);

1009
		if (fw_error && mvm->restart_fw > 0)
1010
			mvm->restart_fw--;
J
Johannes Berg 已提交
1011 1012 1013 1014
		ieee80211_restart_hw(mvm->hw);
	}
}

1015 1016 1017 1018 1019
static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

	iwl_mvm_dump_nic_error_log(mvm);
1020

1021
	iwl_mvm_nic_restart(mvm, true);
1022 1023
}

J
Johannes Berg 已提交
1024 1025
static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
{
1026 1027
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

J
Johannes Berg 已提交
1028
	WARN_ON(1);
1029
	iwl_mvm_nic_restart(mvm, true);
J
Johannes Berg 已提交
1030 1031
}

1032 1033 1034 1035
struct iwl_d0i3_iter_data {
	struct iwl_mvm *mvm;
	u8 ap_sta_id;
	u8 vif_count;
1036 1037
	u8 offloading_tid;
	bool disable_offloading;
1038 1039
};

1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
					struct iwl_d0i3_iter_data *iter_data)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct ieee80211_sta *ap_sta;
	struct iwl_mvm_sta *mvmsta;
	u32 available_tids = 0;
	u8 tid;

	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
		    mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
		return false;

	ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
	if (IS_ERR_OR_NULL(ap_sta))
		return false;

	mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
	spin_lock_bh(&mvmsta->lock);
	for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
		struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];

		/*
		 * in case of pending tx packets, don't use this tid
		 * for offloading in order to prevent reuse of the same
		 * qos seq counters.
		 */
		if (iwl_mvm_tid_queued(tid_data))
			continue;

		if (tid_data->state != IWL_AGG_OFF)
			continue;

		available_tids |= BIT(tid);
	}
	spin_unlock_bh(&mvmsta->lock);

	/*
	 * disallow protocol offloading if we have no available tid
	 * (with no pending frames and no active aggregation,
	 * as we don't handle "holes" properly - the scheduler needs the
	 * frame's seq number and TFD index to match)
	 */
	if (!available_tids)
		return true;

	/* for simplicity, just use the first available tid */
	iter_data->offloading_tid = ffs(available_tids) - 1;
	return false;
}

1092 1093 1094
static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
					struct ieee80211_vif *vif)
{
1095 1096 1097
	struct iwl_d0i3_iter_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1098 1099 1100 1101 1102 1103 1104
	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;

	IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
	if (vif->type != NL80211_IFTYPE_STATION ||
	    !vif->bss_conf.assoc)
		return;

1105 1106 1107 1108 1109 1110 1111 1112
	/*
	 * in case of pending tx packets or active aggregations,
	 * avoid offloading features in order to prevent reuse of
	 * the same qos seq counters.
	 */
	if (iwl_mvm_disallow_offloading(mvm, vif, data))
		data->disable_offloading = true;

1113
	iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1114
	iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1115 1116 1117 1118 1119 1120 1121

	/*
	 * on init/association, mvm already configures POWER_TABLE_CMD
	 * and REPLY_MCAST_FILTER_CMD, so currently don't
	 * reconfigure them (we might want to use different
	 * params later on, though).
	 */
1122 1123
	data->ap_sta_id = mvmvif->ap_sta_id;
	data->vif_count++;
1124 1125
}

1126
static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1127
				    struct iwl_wowlan_config_cmd *cmd,
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142
				    struct iwl_d0i3_iter_data *iter_data)
{
	struct ieee80211_sta *ap_sta;
	struct iwl_mvm_sta *mvm_ap_sta;

	if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
		return;

	rcu_read_lock();

	ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
	if (IS_ERR_OR_NULL(ap_sta))
		goto out;

	mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1143
	cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1144
	cmd->offloading_tid = iter_data->offloading_tid;
1145 1146 1147 1148 1149

	/*
	 * The d0i3 uCode takes care of the nonqos counters,
	 * so configure only the qos seq ones.
	 */
1150
	iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1151 1152 1153
out:
	rcu_read_unlock();
}
1154 1155

int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
E
Eliad Peller 已提交
1156 1157
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1158
	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1159
	int ret;
1160 1161 1162
	struct iwl_d0i3_iter_data d0i3_iter_data = {
		.mvm = mvm,
	};
1163 1164 1165 1166 1167
	struct iwl_wowlan_config_cmd wowlan_config_cmd = {
		.wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
					     IWL_WOWLAN_WAKEUP_BEACON_MISS |
					     IWL_WOWLAN_WAKEUP_LINK_CHANGE |
					     IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1168
	};
1169 1170
	struct iwl_d3_manager_config d3_cfg_cmd = {
		.min_sleep_time = cpu_to_le32(1000),
1171
		.wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1172
	};
E
Eliad Peller 已提交
1173 1174

	IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1175

1176 1177
	set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);

1178 1179 1180 1181 1182 1183 1184 1185 1186
	/*
	 * iwl_mvm_ref_sync takes a reference before checking the flag.
	 * so by checking there is no held reference we prevent a state
	 * in which iwl_mvm_ref_sync continues successfully while we
	 * configure the firmware to enter d0i3
	 */
	if (iwl_mvm_ref_taken(mvm)) {
		IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
		clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1187
		wake_up(&mvm->d0i3_exit_waitq);
1188 1189 1190
		return 1;
	}

1191 1192 1193
	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
						   IEEE80211_IFACE_ITER_NORMAL,
						   iwl_mvm_enter_d0i3_iterator,
1194 1195 1196
						   &d0i3_iter_data);
	if (d0i3_iter_data.vif_count == 1) {
		mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1197
		mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1198 1199 1200
	} else {
		WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
		mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1201
		mvm->d0i3_offloading = false;
1202
	}
1203

1204 1205 1206
	/* make sure we have no running tx while configuring the seqno */
	synchronize_net();

1207 1208 1209 1210 1211
	/* Flush the hw queues, in case something got queued during entry */
	ret = iwl_mvm_flush_tx_path(mvm, iwl_mvm_flushable_queues(mvm), flags);
	if (ret)
		return ret;

1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
	/* configure wowlan configuration only if needed */
	if (mvm->d0i3_ap_sta_id != IWL_MVM_STATION_COUNT) {
		iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd,
					&d0i3_iter_data);

		ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
					   sizeof(wowlan_config_cmd),
					   &wowlan_config_cmd);
		if (ret)
			return ret;
	}
1223

1224 1225 1226
	return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
				    flags | CMD_MAKE_TRANS_IDLE,
				    sizeof(d3_cfg_cmd), &d3_cfg_cmd);
E
Eliad Peller 已提交
1227 1228
}

1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242
static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
				       struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = _data;
	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;

	IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
	if (vif->type != NL80211_IFTYPE_STATION ||
	    !vif->bss_conf.assoc)
		return;

	iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
}

1243 1244 1245 1246 1247 1248 1249
struct iwl_mvm_wakeup_reason_iter_data {
	struct iwl_mvm *mvm;
	u32 wakeup_reasons;
};

static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
					    struct ieee80211_vif *vif)
1250
{
1251
	struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1252 1253 1254
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1255 1256 1257 1258 1259 1260 1261
	    data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
		if (data->wakeup_reasons &
		    IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
			iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
		else
			ieee80211_beacon_loss(vif);
	}
1262 1263
}

1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
{
	struct ieee80211_sta *sta = NULL;
	struct iwl_mvm_sta *mvm_ap_sta;
	int i;
	bool wake_queues = false;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->d0i3_tx_lock);

	if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
		goto out;

	IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");

	/* get the sta in order to update seq numbers and re-enqueue skbs */
	sta = rcu_dereference_protected(
			mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
			lockdep_is_held(&mvm->mutex));

	if (IS_ERR_OR_NULL(sta)) {
		sta = NULL;
		goto out;
	}

	if (mvm->d0i3_offloading && qos_seq) {
		/* update qos seq numbers if offloading was enabled */
1292
		mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
		for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
			u16 seq = le16_to_cpu(qos_seq[i]);
			/* firmware stores last-used one, we store next one */
			seq += 0x10;
			mvm_ap_sta->tid_data[i].seq_number = seq;
		}
	}
out:
	/* re-enqueue (or drop) all packets */
	while (!skb_queue_empty(&mvm->d0i3_tx)) {
		struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);

		if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
			ieee80211_free_txskb(mvm->hw, skb);

		/* if the skb_queue is not empty, we need to wake queues */
		wake_queues = true;
	}
	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
	wake_up(&mvm->d0i3_exit_waitq);
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
	if (wake_queues)
		ieee80211_wake_queues(mvm->hw);

	spin_unlock_bh(&mvm->d0i3_tx_lock);
}

1320 1321 1322 1323 1324
static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
	struct iwl_host_cmd get_status_cmd = {
		.id = WOWLAN_GET_STATUSES,
E
Emmanuel Grumbach 已提交
1325
		.flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1326
	};
1327
	struct iwl_wowlan_status *status;
1328
	int ret;
1329
	u32 handled_reasons, wakeup_reasons = 0;
1330
	__le16 *qos_seq = NULL;
1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341

	mutex_lock(&mvm->mutex);
	ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
	if (ret)
		goto out;

	if (!get_status_cmd.resp_pkt)
		goto out;

	status = (void *)get_status_cmd.resp_pkt->data;
	wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1342
	qos_seq = status->qos_seq_ctr;
1343 1344 1345

	IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);

1346 1347 1348 1349 1350 1351 1352 1353
	handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
				IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
	if (wakeup_reasons & handled_reasons) {
		struct iwl_mvm_wakeup_reason_iter_data data = {
			.mvm = mvm,
			.wakeup_reasons = wakeup_reasons,
		};

1354 1355
		ieee80211_iterate_active_interfaces(
			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1356 1357
			iwl_mvm_d0i3_wakeup_reason_iter, &data);
	}
1358
out:
1359
	iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1360

1361 1362 1363
	IWL_DEBUG_INFO(mvm, "d0i3 exit completed (wakeup reasons: 0x%x)\n",
		       wakeup_reasons);

1364 1365 1366 1367
	/* qos_seq might point inside resp_pkt, so free it only now */
	if (get_status_cmd.resp_pkt)
		iwl_free_resp(&get_status_cmd);

1368 1369 1370
	/* the FW might have updated the regdomain */
	iwl_mvm_update_changed_regdom(mvm);

1371
	iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1372 1373 1374
	mutex_unlock(&mvm->mutex);
}

1375
int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
E
Eliad Peller 已提交
1376
{
1377 1378
	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
		    CMD_WAKE_UP_TRANS;
1379
	int ret;
E
Eliad Peller 已提交
1380 1381

	IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1382

1383 1384 1385 1386 1387 1388 1389 1390 1391
	mutex_lock(&mvm->d0i3_suspend_mutex);
	if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
		IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
		__set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
		mutex_unlock(&mvm->d0i3_suspend_mutex);
		return 0;
	}
	mutex_unlock(&mvm->d0i3_suspend_mutex);

1392 1393
	ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
	if (ret)
1394
		goto out;
1395 1396 1397 1398 1399

	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
						   IEEE80211_IFACE_ITER_NORMAL,
						   iwl_mvm_exit_d0i3_iterator,
						   mvm);
1400 1401 1402
out:
	schedule_work(&mvm->d0i3_exit_work);
	return ret;
E
Eliad Peller 已提交
1403 1404
}

1405
int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1406 1407 1408 1409 1410 1411 1412
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

	iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
	return _iwl_mvm_exit_d0i3(mvm);
}

1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
#define IWL_MVM_COMMON_OPS					\
	/* these could be differentiated */			\
	.queue_full = iwl_mvm_stop_sw_queue,			\
	.queue_not_full = iwl_mvm_wake_sw_queue,		\
	.hw_rf_kill = iwl_mvm_set_hw_rfkill_state,		\
	.free_skb = iwl_mvm_free_skb,				\
	.nic_error = iwl_mvm_nic_error,				\
	.cmd_queue_full = iwl_mvm_cmd_queue_full,		\
	.nic_config = iwl_mvm_nic_config,			\
	.enter_d0i3 = iwl_mvm_enter_d0i3,			\
	.exit_d0i3 = iwl_mvm_exit_d0i3,				\
	/* as we only register one, these MUST be common! */	\
	.start = iwl_op_mode_mvm_start,				\
	.stop = iwl_op_mode_mvm_stop

J
Johannes Berg 已提交
1428
static const struct iwl_op_mode_ops iwl_mvm_ops = {
1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
	IWL_MVM_COMMON_OPS,
	.rx = iwl_mvm_rx,
};

static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
			      struct napi_struct *napi,
			      struct iwl_rx_cmd_buffer *rxb,
			      unsigned int queue)
{
	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

	iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
}

static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {
	IWL_MVM_COMMON_OPS,
	.rx = iwl_mvm_rx_mq,
	.rx_rss = iwl_mvm_rx_mq_rss,
J
Johannes Berg 已提交
1447
};