/******************************************************************************
*
* 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
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
*
* 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
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* 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>
#include <linux/vmalloc.h>
#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 "fw-error-dump.h"
#include "time-event.h"
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
#define DRV_VERSION IWLWIFI_VERSION
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
static const struct iwl_op_mode_ops iwl_mvm_ops;
struct iwl_mvm_mod_params iwlmvm_mod_params = {
.power_scheme = IWL_POWER_SCHEME_BPS,
/* 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");
/*
* 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;
radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
FW_PHY_CFG_RADIO_TYPE_POS;
radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
FW_PHY_CFG_RADIO_STEP_POS;
radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
FW_PHY_CFG_RADIO_DASH_POS;
/* 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);
/* silicon bits */
reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
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);
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.
*/
if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
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);
}
struct iwl_rx_handlers {
u8 cmd_id;
bool async;
int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
};
#define RX_HANDLER(_cmd_id, _fn, _async) \
{ .cmd_id = _cmd_id , .fn = _fn , .async = _async }
/*
* 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(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
iwl_mvm_rx_ant_coupling_notif, true),
RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
iwl_mvm_rx_scan_offload_complete_notif, true),
RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_sched_scan_results,
false),
RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
false),
RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
};
#undef RX_HANDLER
#define CMD(x) [x] = #x
static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
CMD(MVM_ALIVE),
CMD(REPLY_ERROR),
CMD(INIT_COMPLETE_NOTIF),
CMD(PHY_CONTEXT_CMD),
CMD(MGMT_MCAST_KEY),
CMD(TX_CMD),
CMD(TXPATH_FLUSH),
CMD(MAC_CONTEXT_CMD),
CMD(TIME_EVENT_CMD),
CMD(TIME_EVENT_NOTIFICATION),
CMD(BINDING_CONTEXT_CMD),
CMD(TIME_QUOTA_CMD),
CMD(NON_QOS_TX_COUNTER_CMD),
CMD(RADIO_VERSION_NOTIFICATION),
CMD(SCAN_REQUEST_CMD),
CMD(SCAN_ABORT_CMD),
CMD(SCAN_START_NOTIFICATION),
CMD(SCAN_RESULTS_NOTIFICATION),
CMD(SCAN_COMPLETE_NOTIFICATION),
CMD(NVM_ACCESS_CMD),
CMD(PHY_CONFIGURATION_CMD),
CMD(CALIB_RES_NOTIF_PHY_DB),
CMD(SET_CALIB_DEFAULT_CMD),
CMD(CALIBRATION_COMPLETE_NOTIFICATION),
CMD(ADD_STA_KEY),
CMD(ADD_STA),
CMD(REMOVE_STA),
CMD(LQ_CMD),
CMD(SCAN_OFFLOAD_CONFIG_CMD),
CMD(MATCH_FOUND_NOTIFICATION),
CMD(SCAN_OFFLOAD_REQUEST_CMD),
CMD(SCAN_OFFLOAD_ABORT_CMD),
CMD(SCAN_OFFLOAD_COMPLETE),
CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
CMD(POWER_TABLE_CMD),
CMD(WEP_KEY),
CMD(REPLY_RX_PHY_CMD),
CMD(REPLY_RX_MPDU_CMD),
CMD(BEACON_NOTIFICATION),
CMD(BEACON_TEMPLATE_CMD),
CMD(STATISTICS_NOTIFICATION),
CMD(EOSP_NOTIFICATION),
CMD(REDUCE_TX_POWER_CMD),
CMD(TX_ANT_CONFIGURATION_CMD),
CMD(D3_CONFIG_CMD),
CMD(D0I3_END_CMD),
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),
CMD(NET_DETECT_CONFIG_CMD),
CMD(NET_DETECT_PROFILES_QUERY_CMD),
CMD(NET_DETECT_PROFILES_CMD),
CMD(NET_DETECT_HOTSPOTS_CMD),
CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
CMD(CARD_STATE_NOTIFICATION),
CMD(MISSED_BEACONS_NOTIFICATION),
CMD(BT_COEX_PRIO_TABLE),
CMD(BT_COEX_PROT_ENV),
CMD(BT_PROFILE_NOTIFICATION),
CMD(BT_CONFIG),
CMD(MCAST_FILTER_CMD),
CMD(BCAST_FILTER_CMD),
CMD(REPLY_SF_CFG_CMD),
CMD(REPLY_BEACON_FILTERING_CMD),
CMD(REPLY_THERMAL_MNG_BACKOFF),
CMD(MAC_PM_POWER_TABLE),
CMD(BT_COEX_CI),
CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
CMD(ANTENNA_COUPLING_NOTIFICATION),
};
#undef CMD
/* this forward declaration can avoid to export the function */
static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
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;
}
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;
u32 min_backoff;
/*
* 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);
/********************************
* 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;
op_mode = hw->priv;
op_mode->ops = &iwl_mvm_ops;
mvm = IWL_OP_MODE_GET_MVM(op_mode);
mvm->dev = trans->dev;
mvm->trans = trans;
mvm->cfg = cfg;
mvm->fw = fw;
mvm->hw = hw;
mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
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;
}
mvm->sf_state = SF_UNINIT;
mutex_init(&mvm->mutex);
spin_lock_init(&mvm->async_handlers_lock);
INIT_LIST_HEAD(&mvm->time_event_list);
INIT_LIST_HEAD(&mvm->async_handlers_list);
spin_lock_init(&mvm->time_event_lock);
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);
INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
spin_lock_init(&mvm->d0i3_tx_lock);
skb_queue_head_init(&mvm->d0i3_tx);
init_waitqueue_head(&mvm->d0i3_exit_waitq);
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);
trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
trans_cfg.bc_table_dword = true;
if (!iwlwifi_mod_params.wd_disable)
trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
else
trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
trans_cfg.command_names = iwl_mvm_cmd_strings;
trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
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);
/* 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);
min_backoff = calc_min_backoff(trans, cfg);
iwl_mvm_tt_initialize(mvm, min_backoff);
/*
* If the NVM exists in an external file,
* there is no need to unnecessarily power up the NIC at driver load
*/
if (iwlwifi_mod_params.nvm_file) {
err = iwl_nvm_init(mvm);
if (err)
goto out_free;
} 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);
iwl_trans_stop_device(trans);
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;
}
}
scan_size = sizeof(struct iwl_scan_cmd) +
mvm->fw->ucode_capa.max_probe_length +
(MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
if (!mvm->scan_cmd)
goto out_free;
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;
memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
/* rpm starts with a taken ref. only set the appropriate bit here. */
set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
return op_mode;
out_unregister:
ieee80211_unregister_hw(mvm->hw);
iwl_mvm_leds_exit(mvm);
out_free:
iwl_phy_db_free(mvm->phy_db);
kfree(mvm->scan_cmd);
if (!iwlwifi_mod_params.nvm_file)
iwl_trans_op_mode_leave(trans);
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);
iwl_mvm_tt_exit(mvm);
ieee80211_unregister_hw(mvm->hw);
kfree(mvm->scan_cmd);
vfree(mvm->fw_error_dump);
kfree(mvm->fw_error_sram);
kfree(mvm->fw_error_rxf);
kfree(mvm->mcast_filter_cmd);
mvm->mcast_filter_cmd = NULL;
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
kfree(mvm->d3_resume_sram);
#endif
iwl_trans_op_mode_leave(mvm->trans);
iwl_phy_db_free(mvm->phy_db);
mvm->phy_db = NULL;
iwl_free_nvm_data(mvm->nvm_data);
for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
kfree(mvm->nvm_sections[i].data);
ieee80211_free_hw(mvm->hw);
}
struct iwl_async_handler_entry {
struct list_head list;
struct iwl_rx_cmd_buffer rxb;
int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
};
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) {
if (entry->fn(mvm, &entry->rxb, NULL))
IWL_WARN(mvm,
"returned value from ASYNC handlers are ignored\n");
iwl_free_rxb(&entry->rxb);
list_del(&entry->list);
kfree(entry);
}
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u8 i;
/*
* 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];
struct iwl_async_handler_entry *entry;
if (rx_h->cmd_id != pkt->hdr.cmd)
continue;
if (!rx_h->async)
return rx_h->fn(mvm, rxb, cmd);
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
/* we can't do much... */
if (!entry)
return 0;
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;
}
return 0;
}
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);
int mq = mvm->queue_to_mac80211[queue];
if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
return;
if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
IWL_DEBUG_TX_QUEUES(mvm,
"queue %d (mac80211 %d) already stopped\n",
queue, mq);
return;
}
set_bit(mq, &mvm->transport_queue_stop);
ieee80211_stop_queue(mvm->hw, mq);
}
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);
int mq = mvm->queue_to_mac80211[queue];
if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
return;
if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
IWL_DEBUG_TX_QUEUES(mvm,
"queue %d (mac80211 %d) already awake\n",
queue, mq);
return;
}
clear_bit(mq, &mvm->transport_queue_stop);
ieee80211_wake_queue(mvm->hw, mq);
}
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));
}
static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
if (state)
set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
else
clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
return state && mvm->cur_ucode != IWL_UCODE_INIT;
}
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);
}
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);
}
static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
{
iwl_abort_notification_waits(&mvm->notif_wait);
/*
* 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.
*/
switch (mvm->scan_status) {
case IWL_MVM_SCAN_NONE:
break;
case IWL_MVM_SCAN_OS:
ieee80211_scan_completed(mvm->hw, true);
break;
case IWL_MVM_SCAN_SCHED:
/* Sched scan will be restarted by mac80211 in restart_hw. */
if (!mvm->restart_fw)
ieee80211_sched_scan_stopped(mvm->hw);
break;
}
/*
* 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.
*/
if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
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);
} else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
/* don't let the transport/FW power down */
iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
if (mvm->restart_fw > 0)
mvm->restart_fw--;
ieee80211_restart_hw(mvm->hw);
}
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
{
struct iwl_fw_error_dump_file *dump_file;
struct iwl_fw_error_dump_data *dump_data;
u32 file_len;
lockdep_assert_held(&mvm->mutex);
if (mvm->fw_error_dump)
return;
file_len = mvm->fw_error_sram_len +
mvm->fw_error_rxf_len +
sizeof(*dump_file) +
sizeof(*dump_data) * 2;
dump_file = vmalloc(file_len);
if (!dump_file)
return;
mvm->fw_error_dump = dump_file;
dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
dump_file->file_len = cpu_to_le32(file_len);
dump_data = (void *)dump_file->data;
dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
dump_data->len = cpu_to_le32(mvm->fw_error_rxf_len);
memcpy(dump_data->data, mvm->fw_error_rxf, mvm->fw_error_rxf_len);
dump_data = (void *)((u8 *)dump_data->data + mvm->fw_error_rxf_len);
dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
dump_data->len = cpu_to_le32(mvm->fw_error_sram_len);
/*
* No need for lock since at the stage the FW isn't loaded. So it
* can't assert - we are the only one who can possibly be accessing
* mvm->fw_error_sram right now.
*/
memcpy(dump_data->data, mvm->fw_error_sram, mvm->fw_error_sram_len);
kfree(mvm->fw_error_rxf);
mvm->fw_error_rxf = NULL;
mvm->fw_error_rxf_len = 0;
kfree(mvm->fw_error_sram);
mvm->fw_error_sram = NULL;
mvm->fw_error_sram_len = 0;
}
#endif
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);
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_fw_error_sram_dump(mvm);
iwl_mvm_fw_error_rxf_dump(mvm);
#endif
iwl_mvm_nic_restart(mvm);
}
static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
WARN_ON(1);
iwl_mvm_nic_restart(mvm);
}
struct iwl_d0i3_iter_data {
struct iwl_mvm *mvm;
u8 ap_sta_id;
u8 vif_count;
u8 offloading_tid;
bool disable_offloading;
};
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;
}
static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_d0i3_iter_data *data = _data;
struct iwl_mvm *mvm = data->mvm;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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;
/*
* 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;
iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
/*
* 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).
*/
data->ap_sta_id = mvmvif->ap_sta_id;
data->vif_count++;
}
static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
struct iwl_wowlan_config_cmd_v3 *cmd,
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);
cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
cmd->offloading_tid = iter_data->offloading_tid;
/*
* The d0i3 uCode takes care of the nonqos counters,
* so configure only the qos seq ones.
*/
iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
out:
rcu_read_unlock();
}
static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
int ret;
struct iwl_d0i3_iter_data d0i3_iter_data = {
.mvm = mvm,
};
struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
.common = {
.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),
},
};
struct iwl_d3_manager_config d3_cfg_cmd = {
.min_sleep_time = cpu_to_le32(1000),
};
IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
/* make sure we have no running tx while configuring the qos */
set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
synchronize_net();
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_enter_d0i3_iterator,
&d0i3_iter_data);
if (d0i3_iter_data.vif_count == 1) {
mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
} else {
WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
mvm->d0i3_offloading = false;
}
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;
return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
flags | CMD_MAKE_TRANS_IDLE,
sizeof(d3_cfg_cmd), &d3_cfg_cmd);
}
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);
}
static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm *mvm = data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
ieee80211_connection_loss(vif);
}
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 */
mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
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);
}
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,
.flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
};
struct iwl_wowlan_status_v6 *status;
int ret;
u32 disconnection_reasons, wakeup_reasons;
__le16 *qos_seq = NULL;
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);
qos_seq = status->qos_seq_ctr;
IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
disconnection_reasons =
IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
if (wakeup_reasons & disconnection_reasons)
ieee80211_iterate_active_interfaces(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_d0i3_disconnect_iter, mvm);
iwl_free_resp(&get_status_cmd);
out:
iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
CMD_WAKE_UP_TRANS;
int ret;
IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
if (ret)
goto out;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_exit_d0i3_iterator,
mvm);
out:
schedule_work(&mvm->d0i3_exit_work);
return ret;
}
static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
struct napi_struct *napi,
struct net_device *napi_dev,
int (*poll)(struct napi_struct *, int),
int weight)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
}
static const struct iwl_op_mode_ops iwl_mvm_ops = {
.start = iwl_op_mode_mvm_start,
.stop = iwl_op_mode_mvm_stop,
.rx = iwl_mvm_rx_dispatch,
.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,
.napi_add = iwl_mvm_napi_add,
};
