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linux/drivers/net/wireless/iwlwifi/iwl-agn.c
Stanislaw Gruszka 8db4c7e25d iwlwifi: do not nulify ctx->vif on reset 
ctx->vif is dereferenced in different part of iwlwifi code, so do not
nullify it.

This should address at least one of the possible reasons of WARNING at
iwlagn_mac_remove_interface, and perhaps some random crashes when
firmware reset is performed.

Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-23 14:56:12 -04:00

1637 lines
45 KiB
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/******************************************************************************
*
* Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*
* 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 LICENSE.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <net/mac80211.h>
#include <asm/div64.h>
#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-agn-calib.h"
#include "iwl-agn.h"
#include "iwl-shared.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif
#define DRV_VERSION IWLWIFI_VERSION VD
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_ALIAS("iwlagn");
void iwl_update_chain_flags(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
for_each_context(priv, ctx) {
iwlagn_set_rxon_chain(priv, ctx);
if (ctx->active.rx_chain != ctx->staging.rx_chain)
iwlagn_commit_rxon(priv, ctx);
}
}
/* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
static void iwl_set_beacon_tim(struct iwl_priv *priv,
struct iwl_tx_beacon_cmd *tx_beacon_cmd,
u8 *beacon, u32 frame_size)
{
u16 tim_idx;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
/*
* The index is relative to frame start but we start looking at the
* variable-length part of the beacon.
*/
tim_idx = mgmt->u.beacon.variable - beacon;
/* Parse variable-length elements of beacon to find WLAN_EID_TIM */
while ((tim_idx < (frame_size - 2)) &&
(beacon[tim_idx] != WLAN_EID_TIM))
tim_idx += beacon[tim_idx+1] + 2;
/* If TIM field was found, set variables */
if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
tx_beacon_cmd->tim_size = beacon[tim_idx+1];
} else
IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
}
int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
{
struct iwl_tx_beacon_cmd *tx_beacon_cmd;
struct iwl_host_cmd cmd = {
.id = REPLY_TX_BEACON,
.flags = CMD_SYNC,
};
struct ieee80211_tx_info *info;
u32 frame_size;
u32 rate_flags;
u32 rate;
/*
* We have to set up the TX command, the TX Beacon command, and the
* beacon contents.
*/
lockdep_assert_held(&priv->mutex);
if (!priv->beacon_ctx) {
IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
return 0;
}
if (WARN_ON(!priv->beacon_skb))
return -EINVAL;
/* Allocate beacon command */
if (!priv->beacon_cmd)
priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
tx_beacon_cmd = priv->beacon_cmd;
if (!tx_beacon_cmd)
return -ENOMEM;
frame_size = priv->beacon_skb->len;
/* Set up TX command fields */
tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
/* Set up TX beacon command fields */
iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
frame_size);
/* Set up packet rate and flags */
info = IEEE80211_SKB_CB(priv->beacon_skb);
/*
* Let's set up the rate at least somewhat correctly;
* it will currently not actually be used by the uCode,
* it uses the broadcast station's rate instead.
*/
if (info->control.rates[0].idx < 0 ||
info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
rate = 0;
else
rate = info->control.rates[0].idx;
priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
hw_params(priv).valid_tx_ant);
rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
/* In mac80211, rates for 5 GHz start at 0 */
if (info->band == IEEE80211_BAND_5GHZ)
rate += IWL_FIRST_OFDM_RATE;
else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
tx_beacon_cmd->tx.rate_n_flags =
iwl_hw_set_rate_n_flags(rate, rate_flags);
/* Submit command */
cmd.len[0] = sizeof(*tx_beacon_cmd);
cmd.data[0] = tx_beacon_cmd;
cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
cmd.len[1] = frame_size;
cmd.data[1] = priv->beacon_skb->data;
cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
return iwl_dvm_send_cmd(priv, &cmd);
}
static void iwl_bg_beacon_update(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, beacon_update);
struct sk_buff *beacon;
mutex_lock(&priv->mutex);
if (!priv->beacon_ctx) {
IWL_ERR(priv, "updating beacon w/o beacon context!\n");
goto out;
}
if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
/*
* The ucode will send beacon notifications even in
* IBSS mode, but we don't want to process them. But
* we need to defer the type check to here due to
* requiring locking around the beacon_ctx access.
*/
goto out;
}
/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
if (!beacon) {
IWL_ERR(priv, "update beacon failed -- keeping old\n");
goto out;
}
/* new beacon skb is allocated every time; dispose previous.*/
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = beacon;
iwlagn_send_beacon_cmd(priv);
out:
mutex_unlock(&priv->mutex);
}
static void iwl_bg_bt_runtime_config(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, bt_runtime_config);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
iwlagn_send_advance_bt_config(priv);
}
static void iwl_bg_bt_full_concurrency(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, bt_full_concurrency);
struct iwl_rxon_context *ctx;
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
goto out;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
goto out;
IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
priv->bt_full_concurrent ?
"full concurrency" : "3-wire");
/*
* LQ & RXON updated cmds must be sent before BT Config cmd
* to avoid 3-wire collisions
*/
for_each_context(priv, ctx) {
iwlagn_set_rxon_chain(priv, ctx);
iwlagn_commit_rxon(priv, ctx);
}
iwlagn_send_advance_bt_config(priv);
out:
mutex_unlock(&priv->mutex);
}
/**
* iwl_bg_statistics_periodic - Timer callback to queue statistics
*
* This callback is provided in order to send a statistics request.
*
* This timer function is continually reset to execute within
* REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
* was received. We need to ensure we receive the statistics in order
* to update the temperature used for calibrating the TXPOWER.
*/
static void iwl_bg_statistics_periodic(unsigned long data)
{
struct iwl_priv *priv = (struct iwl_priv *)data;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
iwl_send_statistics_request(priv, CMD_ASYNC, false);
}
static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
u32 start_idx, u32 num_events,
u32 capacity, u32 mode)
{
u32 i;
u32 ptr; /* SRAM byte address of log data */
u32 ev, time, data; /* event log data */
unsigned long reg_flags;
if (mode == 0)
ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
else
ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
/* Make sure device is powered up for SRAM reads */
spin_lock_irqsave(&trans(priv)->reg_lock, reg_flags);
if (unlikely(!iwl_grab_nic_access(trans(priv)))) {
spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
return;
}
/* Set starting address; reads will auto-increment */
iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, ptr);
/*
* Refuse to read more than would have fit into the log from
* the current start_idx. This used to happen due to the race
* described below, but now WARN because the code below should
* prevent it from happening here.
*/
if (WARN_ON(num_events > capacity - start_idx))
num_events = capacity - start_idx;
/*
* "time" is actually "data" for mode 0 (no timestamp).
* place event id # at far right for easier visual parsing.
*/
for (i = 0; i < num_events; i++) {
ev = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
time = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
if (mode == 0) {
trace_iwlwifi_dev_ucode_cont_event(
trans(priv)->dev, 0, time, ev);
} else {
data = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
trace_iwlwifi_dev_ucode_cont_event(
trans(priv)->dev, time, data, ev);
}
}
/* Allow device to power down */
iwl_release_nic_access(trans(priv));
spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
}
static void iwl_continuous_event_trace(struct iwl_priv *priv)
{
u32 capacity; /* event log capacity in # entries */
struct {
u32 capacity;
u32 mode;
u32 wrap_counter;
u32 write_counter;
} __packed read;
u32 base; /* SRAM byte address of event log header */
u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
u32 num_wraps; /* # times uCode wrapped to top of log */
u32 next_entry; /* index of next entry to be written by uCode */
base = priv->shrd->device_pointers.log_event_table;
if (iwlagn_hw_valid_rtc_data_addr(base)) {
iwl_read_targ_mem_words(trans(priv), base, &read, sizeof(read));
capacity = read.capacity;
mode = read.mode;
num_wraps = read.wrap_counter;
next_entry = read.write_counter;
} else
return;
/*
* Unfortunately, the uCode doesn't use temporary variables.
* Therefore, it can happen that we read next_entry == capacity,
* which really means next_entry == 0.
*/
if (unlikely(next_entry == capacity))
next_entry = 0;
/*
* Additionally, the uCode increases the write pointer before
* the wraps counter, so if the write pointer is smaller than
* the old write pointer (wrap occurred) but we read that no
* wrap occurred, we actually read between the next_entry and
* num_wraps update (this does happen in practice!!) -- take
* that into account by increasing num_wraps.
*/
if (unlikely(next_entry < priv->event_log.next_entry &&
num_wraps == priv->event_log.num_wraps))
num_wraps++;
if (num_wraps == priv->event_log.num_wraps) {
iwl_print_cont_event_trace(
priv, base, priv->event_log.next_entry,
next_entry - priv->event_log.next_entry,
capacity, mode);
priv->event_log.non_wraps_count++;
} else {
if (num_wraps - priv->event_log.num_wraps > 1)
priv->event_log.wraps_more_count++;
else
priv->event_log.wraps_once_count++;
trace_iwlwifi_dev_ucode_wrap_event(trans(priv)->dev,
num_wraps - priv->event_log.num_wraps,
next_entry, priv->event_log.next_entry);
if (next_entry < priv->event_log.next_entry) {
iwl_print_cont_event_trace(
priv, base, priv->event_log.next_entry,
capacity - priv->event_log.next_entry,
capacity, mode);
iwl_print_cont_event_trace(
priv, base, 0, next_entry, capacity, mode);
} else {
iwl_print_cont_event_trace(
priv, base, next_entry,
capacity - next_entry,
capacity, mode);
iwl_print_cont_event_trace(
priv, base, 0, next_entry, capacity, mode);
}
}
priv->event_log.num_wraps = num_wraps;
priv->event_log.next_entry = next_entry;
}
/**
* iwl_bg_ucode_trace - Timer callback to log ucode event
*
* The timer is continually set to execute every
* UCODE_TRACE_PERIOD milliseconds after the last timer expired
* this function is to perform continuous uCode event logging operation
* if enabled
*/
static void iwl_bg_ucode_trace(unsigned long data)
{
struct iwl_priv *priv = (struct iwl_priv *)data;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (priv->event_log.ucode_trace) {
iwl_continuous_event_trace(priv);
/* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
mod_timer(&priv->ucode_trace,
jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
}
}
static void iwl_bg_tx_flush(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, tx_flush);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* do nothing if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
}
static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
{
int i;
/*
* The default context is always valid,
* the PAN context depends on uCode.
*/
priv->shrd->valid_contexts = BIT(IWL_RXON_CTX_BSS);
if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
priv->shrd->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
for (i = 0; i < NUM_IWL_RXON_CTX; i++)
priv->contexts[i].ctxid = i;
priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
BIT(NL80211_IFTYPE_ADHOC);
priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
BIT(NL80211_IFTYPE_STATION);
priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
REPLY_WIPAN_RXON_TIMING;
priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
REPLY_WIPAN_RXON_ASSOC;
priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
if (ucode_flags & IWL_UCODE_TLV_FLAGS_P2P)
priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_P2P_GO);
priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
}
static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
struct iwl_ct_kill_config cmd;
struct iwl_ct_kill_throttling_config adv_cmd;
int ret = 0;
iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
priv->thermal_throttle.ct_kill_toggle = false;
if (cfg(priv)->base_params->support_ct_kill_exit) {
adv_cmd.critical_temperature_enter =
cpu_to_le32(hw_params(priv).ct_kill_threshold);
adv_cmd.critical_temperature_exit =
cpu_to_le32(hw_params(priv).ct_kill_exit_threshold);
ret = iwl_dvm_send_cmd_pdu(priv,
REPLY_CT_KILL_CONFIG_CMD,
CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
if (ret)
IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
else
IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
"succeeded, critical temperature enter is %d,"
"exit is %d\n",
hw_params(priv).ct_kill_threshold,
hw_params(priv).ct_kill_exit_threshold);
} else {
cmd.critical_temperature_R =
cpu_to_le32(hw_params(priv).ct_kill_threshold);
ret = iwl_dvm_send_cmd_pdu(priv,
REPLY_CT_KILL_CONFIG_CMD,
CMD_SYNC, sizeof(cmd), &cmd);
if (ret)
IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
else
IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
"succeeded, "
"critical temperature is %d\n",
hw_params(priv).ct_kill_threshold);
}
}
static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
{
struct iwl_calib_cfg_cmd calib_cfg_cmd;
struct iwl_host_cmd cmd = {
.id = CALIBRATION_CFG_CMD,
.len = { sizeof(struct iwl_calib_cfg_cmd), },
.data = { &calib_cfg_cmd, },
};
memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
return iwl_dvm_send_cmd(priv, &cmd);
}
static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
{
struct iwl_tx_ant_config_cmd tx_ant_cmd = {
.valid = cpu_to_le32(valid_tx_ant),
};
if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
return iwl_dvm_send_cmd_pdu(priv,
TX_ANT_CONFIGURATION_CMD,
CMD_SYNC,
sizeof(struct iwl_tx_ant_config_cmd),
&tx_ant_cmd);
} else {
IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
return -EOPNOTSUPP;
}
}
/**
* iwl_alive_start - called after REPLY_ALIVE notification received
* from protocol/runtime uCode (initialization uCode's
* Alive gets handled by iwl_init_alive_start()).
*/
int iwl_alive_start(struct iwl_priv *priv)
{
int ret = 0;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
/* After the ALIVE response, we can send host commands to the uCode */
set_bit(STATUS_ALIVE, &priv->status);
/* Enable watchdog to monitor the driver tx queues */
iwl_setup_watchdog(priv);
if (iwl_is_rfkill(priv))
return -ERFKILL;
if (priv->event_log.ucode_trace) {
/* start collecting data now */
mod_timer(&priv->ucode_trace, jiffies);
}
/* download priority table before any calibration request */
if (cfg(priv)->bt_params &&
cfg(priv)->bt_params->advanced_bt_coexist) {
/* Configure Bluetooth device coexistence support */
if (cfg(priv)->bt_params->bt_sco_disable)
priv->bt_enable_pspoll = false;
else
priv->bt_enable_pspoll = true;
priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
iwlagn_send_advance_bt_config(priv);
priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
priv->cur_rssi_ctx = NULL;
iwl_send_prio_tbl(priv);
/* FIXME: w/a to force change uCode BT state machine */
ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
if (ret)
return ret;
ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
if (ret)
return ret;
} else {
/*
* default is 2-wire BT coexexistence support
*/
iwl_send_bt_config(priv);
}
/*
* Perform runtime calibrations, including DC calibration.
*/
iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
ieee80211_wake_queues(priv->hw);
priv->active_rate = IWL_RATES_MASK;
/* Configure Tx antenna selection based on H/W config */
iwlagn_send_tx_ant_config(priv, hw_params(priv).valid_tx_ant);
if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
struct iwl_rxon_cmd *active_rxon =
(struct iwl_rxon_cmd *)&ctx->active;
/* apply any changes in staging */
ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
} else {
struct iwl_rxon_context *tmp;
/* Initialize our rx_config data */
for_each_context(priv, tmp)
iwl_connection_init_rx_config(priv, tmp);
iwlagn_set_rxon_chain(priv, ctx);
}
if (!priv->wowlan) {
/* WoWLAN ucode will not reply in the same way, skip it */
iwl_reset_run_time_calib(priv);
}
set_bit(STATUS_READY, &priv->status);
/* Configure the adapter for unassociated operation */
ret = iwlagn_commit_rxon(priv, ctx);
if (ret)
return ret;
/* At this point, the NIC is initialized and operational */
iwl_rf_kill_ct_config(priv);
IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
return iwl_power_update_mode(priv, true);
}
/**
* iwl_clear_driver_stations - clear knowledge of all stations from driver
* @priv: iwl priv struct
*
* This is called during iwl_down() to make sure that in the case
* we're coming there from a hardware restart mac80211 will be
* able to reconfigure stations -- if we're getting there in the
* normal down flow then the stations will already be cleared.
*/
static void iwl_clear_driver_stations(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
spin_lock_bh(&priv->sta_lock);
memset(priv->stations, 0, sizeof(priv->stations));
priv->num_stations = 0;
priv->ucode_key_table = 0;
for_each_context(priv, ctx) {
/*
* Remove all key information that is not stored as part
* of station information since mac80211 may not have had
* a chance to remove all the keys. When device is
* reconfigured by mac80211 after an error all keys will
* be reconfigured.
*/
memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
ctx->key_mapping_keys = 0;
}
spin_unlock_bh(&priv->sta_lock);
}
void iwl_down(struct iwl_priv *priv)
{
int exit_pending;
IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
lockdep_assert_held(&priv->mutex);
iwl_scan_cancel_timeout(priv, 200);
/*
* If active, scanning won't cancel it, so say it expired.
* No race since we hold the mutex here and a new one
* can't come in at this time.
*/
ieee80211_remain_on_channel_expired(priv->hw);
exit_pending =
test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
/* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
* to prevent rearm timer */
del_timer_sync(&priv->watchdog);
iwl_clear_ucode_stations(priv, NULL);
iwl_dealloc_bcast_stations(priv);
iwl_clear_driver_stations(priv);
/* reset BT coex data */
priv->bt_status = 0;
priv->cur_rssi_ctx = NULL;
priv->bt_is_sco = 0;
if (cfg(priv)->bt_params)
priv->bt_traffic_load =
cfg(priv)->bt_params->bt_init_traffic_load;
else
priv->bt_traffic_load = 0;
priv->bt_full_concurrent = false;
priv->bt_ci_compliance = 0;
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
clear_bit(STATUS_EXIT_PENDING, &priv->status);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
priv->ucode_loaded = false;
iwl_trans_stop_device(trans(priv));
/* Clear out all status bits but a few that are stable across reset */
priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
priv->shrd->status &=
test_bit(STATUS_FW_ERROR, &priv->shrd->status) <<
STATUS_FW_ERROR;
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = NULL;
}
/*****************************************************************************
*
* Workqueue callbacks
*
*****************************************************************************/
static void iwl_bg_run_time_calib_work(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv,
run_time_calib_work);
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status)) {
mutex_unlock(&priv->mutex);
return;
}
if (priv->start_calib) {
iwl_chain_noise_calibration(priv);
iwl_sensitivity_calibration(priv);
}
mutex_unlock(&priv->mutex);
}
void iwlagn_prepare_restart(struct iwl_priv *priv)
{
bool bt_full_concurrent;
u8 bt_ci_compliance;
u8 bt_load;
u8 bt_status;
bool bt_is_sco;
lockdep_assert_held(&priv->mutex);
priv->is_open = 0;
/*
* __iwl_down() will clear the BT status variables,
* which is correct, but when we restart we really
* want to keep them so restore them afterwards.
*
* The restart process will later pick them up and
* re-configure the hw when we reconfigure the BT
* command.
*/
bt_full_concurrent = priv->bt_full_concurrent;
bt_ci_compliance = priv->bt_ci_compliance;
bt_load = priv->bt_traffic_load;
bt_status = priv->bt_status;
bt_is_sco = priv->bt_is_sco;
iwl_down(priv);
priv->bt_full_concurrent = bt_full_concurrent;
priv->bt_ci_compliance = bt_ci_compliance;
priv->bt_traffic_load = bt_load;
priv->bt_status = bt_status;
priv->bt_is_sco = bt_is_sco;
}
static void iwl_bg_restart(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (test_and_clear_bit(STATUS_FW_ERROR, &priv->shrd->status)) {
mutex_lock(&priv->mutex);
iwlagn_prepare_restart(priv);
mutex_unlock(&priv->mutex);
iwl_cancel_deferred_work(priv);
ieee80211_restart_hw(priv->hw);
} else {
WARN_ON(1);
}
}
void iwlagn_disable_roc(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
lockdep_assert_held(&priv->mutex);
if (!priv->hw_roc_setup)
return;
ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
priv->hw_roc_channel = NULL;
memset(ctx->staging.node_addr, 0, ETH_ALEN);
iwlagn_commit_rxon(priv, ctx);
ctx->is_active = false;
priv->hw_roc_setup = false;
}
static void iwlagn_disable_roc_work(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv,
hw_roc_disable_work.work);
mutex_lock(&priv->mutex);
iwlagn_disable_roc(priv);
mutex_unlock(&priv->mutex);
}
/*****************************************************************************
*
* driver setup and teardown
*
*****************************************************************************/
static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
priv->workqueue = create_singlethread_workqueue(DRV_NAME);
INIT_WORK(&priv->restart, iwl_bg_restart);
INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
INIT_DELAYED_WORK(&priv->hw_roc_disable_work,
iwlagn_disable_roc_work);
iwl_setup_scan_deferred_work(priv);
if (cfg(priv)->bt_params)
iwlagn_bt_setup_deferred_work(priv);
init_timer(&priv->statistics_periodic);
priv->statistics_periodic.data = (unsigned long)priv;
priv->statistics_periodic.function = iwl_bg_statistics_periodic;
init_timer(&priv->ucode_trace);
priv->ucode_trace.data = (unsigned long)priv;
priv->ucode_trace.function = iwl_bg_ucode_trace;
init_timer(&priv->watchdog);
priv->watchdog.data = (unsigned long)priv;
priv->watchdog.function = iwl_bg_watchdog;
}
void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
if (cfg(priv)->bt_params)
iwlagn_bt_cancel_deferred_work(priv);
cancel_work_sync(&priv->run_time_calib_work);
cancel_work_sync(&priv->beacon_update);
iwl_cancel_scan_deferred_work(priv);
cancel_work_sync(&priv->bt_full_concurrency);
cancel_work_sync(&priv->bt_runtime_config);
cancel_delayed_work_sync(&priv->hw_roc_disable_work);
del_timer_sync(&priv->statistics_periodic);
del_timer_sync(&priv->ucode_trace);
}
static void iwl_init_hw_rates(struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
rates[i].bitrate = iwl_rates[i].ieee * 5;
rates[i].hw_value = i; /* Rate scaling will work on indexes */
rates[i].hw_value_short = i;
rates[i].flags = 0;
if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
/*
* If CCK != 1M then set short preamble rate flag.
*/
rates[i].flags |=
(iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
0 : IEEE80211_RATE_SHORT_PREAMBLE;
}
}
}
static int iwl_init_drv(struct iwl_priv *priv)
{
int ret;
spin_lock_init(&priv->sta_lock);
mutex_init(&priv->mutex);
INIT_LIST_HEAD(&priv->calib_results);
priv->ieee_channels = NULL;
priv->ieee_rates = NULL;
priv->band = IEEE80211_BAND_2GHZ;
priv->plcp_delta_threshold =
cfg(priv)->base_params->plcp_delta_threshold;
priv->iw_mode = NL80211_IFTYPE_STATION;
priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
priv->agg_tids_count = 0;
priv->ucode_owner = IWL_OWNERSHIP_DRIVER;
/* initialize force reset */
priv->force_reset[IWL_RF_RESET].reset_duration =
IWL_DELAY_NEXT_FORCE_RF_RESET;
priv->force_reset[IWL_FW_RESET].reset_duration =
IWL_DELAY_NEXT_FORCE_FW_RELOAD;
priv->rx_statistics_jiffies = jiffies;
/* Choose which receivers/antennas to use */
iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
iwl_init_scan_params(priv);
/* init bt coex */
if (cfg(priv)->bt_params &&
cfg(priv)->bt_params->advanced_bt_coexist) {
priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
priv->bt_duration = BT_DURATION_LIMIT_DEF;
priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
}
ret = iwl_init_channel_map(priv);
if (ret) {
IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
goto err;
}
ret = iwl_init_geos(priv);
if (ret) {
IWL_ERR(priv, "initializing geos failed: %d\n", ret);
goto err_free_channel_map;
}
iwl_init_hw_rates(priv->ieee_rates);
return 0;
err_free_channel_map:
iwl_free_channel_map(priv);
err:
return ret;
}
static void iwl_uninit_drv(struct iwl_priv *priv)
{
iwl_free_geos(priv);
iwl_free_channel_map(priv);
kfree(priv->scan_cmd);
kfree(priv->beacon_cmd);
kfree(rcu_dereference_raw(priv->noa_data));
iwl_calib_free_results(priv);
#ifdef CONFIG_IWLWIFI_DEBUGFS
kfree(priv->wowlan_sram);
#endif
}
/* Size of one Rx buffer in host DRAM */
#define IWL_RX_BUF_SIZE_4K (4 * 1024)
#define IWL_RX_BUF_SIZE_8K (8 * 1024)
static void iwl_set_hw_params(struct iwl_priv *priv)
{
if (cfg(priv)->ht_params)
hw_params(priv).use_rts_for_aggregation =
cfg(priv)->ht_params->use_rts_for_aggregation;
if (iwlagn_mod_params.amsdu_size_8K)
hw_params(priv).rx_page_order =
get_order(IWL_RX_BUF_SIZE_8K);
else
hw_params(priv).rx_page_order =
get_order(IWL_RX_BUF_SIZE_4K);
if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
hw_params(priv).sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
hw_params(priv).num_ampdu_queues =
cfg(priv)->base_params->num_of_ampdu_queues;
hw_params(priv).wd_timeout = cfg(priv)->base_params->wd_timeout;
/* Device-specific setup */
cfg(priv)->lib->set_hw_params(priv);
}
static void iwl_debug_config(struct iwl_priv *priv)
{
dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUG "
#ifdef CONFIG_IWLWIFI_DEBUG
"enabled\n");
#else
"disabled\n");
#endif
dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUGFS "
#ifdef CONFIG_IWLWIFI_DEBUGFS
"enabled\n");
#else
"disabled\n");
#endif
dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TRACING "
#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
"enabled\n");
#else
"disabled\n");
#endif
dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TESTMODE "
#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
"enabled\n");
#else
"disabled\n");
#endif
dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_P2P "
#ifdef CONFIG_IWLWIFI_P2P
"enabled\n");
#else
"disabled\n");
#endif
}
static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
const struct iwl_fw *fw)
{
int err = 0;
struct iwl_priv *priv;
struct ieee80211_hw *hw;
struct iwl_op_mode *op_mode;
u16 num_mac;
u32 ucode_flags;
struct iwl_trans_config trans_cfg;
static const u8 no_reclaim_cmds[] = {
REPLY_RX_PHY_CMD,
REPLY_RX,
REPLY_RX_MPDU_CMD,
REPLY_COMPRESSED_BA,
STATISTICS_NOTIFICATION,
REPLY_TX,
};
/************************
* 1. Allocating HW data
************************/
hw = iwl_alloc_all();
if (!hw) {
pr_err("%s: Cannot allocate network device\n",
cfg(trans)->name);
err = -ENOMEM;
goto out;
}
op_mode = hw->priv;
op_mode->ops = &iwl_dvm_ops;
priv = IWL_OP_MODE_GET_DVM(op_mode);
priv->shrd = trans->shrd;
priv->fw = fw;
/* TODO: remove fw from shared data later */
priv->shrd->fw = fw;
/*
* 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);
ucode_flags = fw->ucode_capa.flags;
#ifndef CONFIG_IWLWIFI_P2P
ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
#endif
if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
} else {
priv->sta_key_max_num = STA_KEY_MAX_NUM;
trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
}
/* Configure transport layer */
iwl_trans_configure(trans(priv), &trans_cfg);
/* At this point both hw and priv are allocated. */
SET_IEEE80211_DEV(priv->hw, trans(priv)->dev);
/* show what debugging capabilities we have */
iwl_debug_config(priv);
IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
/* is antenna coupling more than 35dB ? */
priv->bt_ant_couple_ok =
(iwlagn_mod_params.ant_coupling >
IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
true : false;
/* enable/disable bt channel inhibition */
priv->bt_ch_announce = iwlagn_mod_params.bt_ch_announce;
IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
(priv->bt_ch_announce) ? "On" : "Off");
if (iwl_alloc_traffic_mem(priv))
IWL_ERR(priv, "Not enough memory to generate traffic log\n");
/* these spin locks will be used in apm_ops.init and EEPROM access
* we should init now
*/
spin_lock_init(&trans(priv)->reg_lock);
spin_lock_init(&priv->statistics.lock);
/***********************
* 2. Read REV register
***********************/
IWL_INFO(priv, "Detected %s, REV=0x%X\n",
cfg(priv)->name, trans(priv)->hw_rev);
err = iwl_trans_start_hw(trans(priv));
if (err)
goto out_free_traffic_mem;
/*****************
* 3. Read EEPROM
*****************/
err = iwl_eeprom_init(trans(priv), trans(priv)->hw_rev);
/* Reset chip to save power until we load uCode during "up". */
iwl_trans_stop_hw(trans(priv));
if (err) {
IWL_ERR(priv, "Unable to init EEPROM\n");
goto out_free_traffic_mem;
}
err = iwl_eeprom_check_version(priv);
if (err)
goto out_free_eeprom;
err = iwl_eeprom_init_hw_params(priv);
if (err)
goto out_free_eeprom;
/* extract MAC Address */
iwl_eeprom_get_mac(priv->shrd, priv->addresses[0].addr);
IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
priv->hw->wiphy->addresses = priv->addresses;
priv->hw->wiphy->n_addresses = 1;
num_mac = iwl_eeprom_query16(priv->shrd, EEPROM_NUM_MAC_ADDRESS);
if (num_mac > 1) {
memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
ETH_ALEN);
priv->addresses[1].addr[5]++;
priv->hw->wiphy->n_addresses++;
}
/************************
* 4. Setup HW constants
************************/
iwl_set_hw_params(priv);
if (!(hw_params(priv).sku & EEPROM_SKU_CAP_IPAN_ENABLE)) {
IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN");
ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
/*
* if not PAN, then don't support P2P -- might be a uCode
* packaging bug or due to the eeprom check above
*/
ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
priv->sta_key_max_num = STA_KEY_MAX_NUM;
trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
/* Configure transport layer again*/
iwl_trans_configure(trans(priv), &trans_cfg);
}
/*******************
* 5. Setup priv
*******************/
err = iwl_init_drv(priv);
if (err)
goto out_free_eeprom;
/* At this point both hw and priv are initialized. */
/********************
* 6. Setup services
********************/
iwl_setup_deferred_work(priv);
iwl_setup_rx_handlers(priv);
iwl_testmode_init(priv);
iwl_power_initialize(priv);
iwl_tt_initialize(priv);
snprintf(priv->hw->wiphy->fw_version,
sizeof(priv->hw->wiphy->fw_version),
"%s", fw->fw_version);
priv->new_scan_threshold_behaviour =
!!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
priv->phy_calib_chain_noise_reset_cmd =
fw->ucode_capa.standard_phy_calibration_size;
priv->phy_calib_chain_noise_gain_cmd =
fw->ucode_capa.standard_phy_calibration_size + 1;
/* initialize all valid contexts */
iwl_init_context(priv, ucode_flags);
/**************************************************
* This is still part of probe() in a sense...
*
* 7. Setup and register with mac80211 and debugfs
**************************************************/
err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
if (err)
goto out_destroy_workqueue;
err = iwl_dbgfs_register(priv, DRV_NAME);
if (err)
IWL_ERR(priv,
"failed to create debugfs files. Ignoring error: %d\n",
err);
return op_mode;
out_destroy_workqueue:
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
iwl_uninit_drv(priv);
out_free_eeprom:
iwl_eeprom_free(priv->shrd);
out_free_traffic_mem:
iwl_free_traffic_mem(priv);
ieee80211_free_hw(priv->hw);
out:
op_mode = NULL;
return op_mode;
}
static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
{
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
iwl_dbgfs_unregister(priv);
iwl_testmode_cleanup(priv);
iwlagn_mac_unregister(priv);
iwl_tt_exit(priv);
/*This will stop the queues, move the device to low power state */
priv->ucode_loaded = false;
iwl_trans_stop_device(trans(priv));
iwl_eeprom_free(priv->shrd);
/*netif_stop_queue(dev); */
flush_workqueue(priv->workqueue);
/* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
* priv->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
iwl_free_traffic_mem(priv);
iwl_uninit_drv(priv);
dev_kfree_skb(priv->beacon_skb);
ieee80211_free_hw(priv->hw);
}
static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
{
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
if (!iwl_check_for_ct_kill(priv)) {
IWL_ERR(priv, "Restarting adapter queue is full\n");
iwl_nic_error(op_mode);
}
}
static void iwl_nic_config(struct iwl_op_mode *op_mode)
{
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
cfg(priv)->lib->nic_config(priv);
}
static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
{
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
set_bit(ac, &priv->transport_queue_stop);
ieee80211_stop_queue(priv->hw, ac);
}
static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
{
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
clear_bit(ac, &priv->transport_queue_stop);
if (!priv->passive_no_rx)
ieee80211_wake_queue(priv->hw, ac);
}
void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
{
int ac;
if (!priv->passive_no_rx)
return;
for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) {
if (!test_bit(ac, &priv->transport_queue_stop)) {
IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d");
ieee80211_wake_queue(priv->hw, ac);
} else {
IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d");
}
}
priv->passive_no_rx = false;
}
const struct iwl_op_mode_ops iwl_dvm_ops = {
.start = iwl_op_mode_dvm_start,
.stop = iwl_op_mode_dvm_stop,
.rx = iwl_rx_dispatch,
.queue_full = iwl_stop_sw_queue,
.queue_not_full = iwl_wake_sw_queue,
.hw_rf_kill = iwl_set_hw_rfkill_state,
.free_skb = iwl_free_skb,
.nic_error = iwl_nic_error,
.cmd_queue_full = iwl_cmd_queue_full,
.nic_config = iwl_nic_config,
};
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
struct kmem_cache *iwl_tx_cmd_pool;
static int __init iwl_init(void)
{
int ret;
pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
pr_info(DRV_COPYRIGHT "\n");
iwl_tx_cmd_pool = kmem_cache_create("iwl_dev_cmd",
sizeof(struct iwl_device_cmd),
sizeof(void *), 0, NULL);
if (!iwl_tx_cmd_pool)
return -ENOMEM;
ret = iwlagn_rate_control_register();
if (ret) {
pr_err("Unable to register rate control algorithm: %d\n", ret);
goto error_rc_register;
}
ret = iwl_pci_register_driver();
if (ret)
goto error_pci_register;
return ret;
error_pci_register:
iwlagn_rate_control_unregister();
error_rc_register:
kmem_cache_destroy(iwl_tx_cmd_pool);
return ret;
}
static void __exit iwl_exit(void)
{
iwl_pci_unregister_driver();
iwlagn_rate_control_unregister();
kmem_cache_destroy(iwl_tx_cmd_pool);
}
module_exit(iwl_exit);
module_init(iwl_init);
#ifdef CONFIG_IWLWIFI_DEBUG
module_param_named(debug, iwlagn_mod_params.debug_level, uint,
S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "debug output mask");
#endif
module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(11n_disable, iwlagn_mod_params.disable_11n, uint, S_IRUGO);
MODULE_PARM_DESC(11n_disable,
"disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
int, S_IRUGO);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
module_param_named(ucode_alternative,
iwlagn_mod_params.wanted_ucode_alternative,
int, S_IRUGO);
MODULE_PARM_DESC(ucode_alternative,
"specify ucode alternative to use from ucode file");
module_param_named(antenna_coupling, iwlagn_mod_params.ant_coupling,
int, S_IRUGO);
MODULE_PARM_DESC(antenna_coupling,
"specify antenna coupling in dB (defualt: 0 dB)");
module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
bool, S_IRUGO);
MODULE_PARM_DESC(bt_ch_inhibition,
"Enable BT channel inhibition (default: enable)");
module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
module_param_named(wd_disable, iwlagn_mod_params.wd_disable, int, S_IRUGO);
MODULE_PARM_DESC(wd_disable,
"Disable stuck queue watchdog timer 0=system default, "
"1=disable, 2=enable (default: 0)");
/*
* set bt_coex_active to true, uCode will do kill/defer
* every time the priority line is asserted (BT is sending signals on the
* priority line in the PCIx).
* set bt_coex_active to false, uCode will ignore the BT activity and
* perform the normal operation
*
* User might experience transmit issue on some platform due to WiFi/BT
* co-exist problem. The possible behaviors are:
* Able to scan and finding all the available AP
* Not able to associate with any AP
* On those platforms, WiFi communication can be restored by set
* "bt_coex_active" module parameter to "false"
*
* default: bt_coex_active = true (BT_COEX_ENABLE)
*/
module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
bool, S_IRUGO);
MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
MODULE_PARM_DESC(led_mode, "0=system default, "
"1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");
module_param_named(power_save, iwlagn_mod_params.power_save,
bool, S_IRUGO);
MODULE_PARM_DESC(power_save,
"enable WiFi power management (default: disable)");
module_param_named(power_level, iwlagn_mod_params.power_level,
int, S_IRUGO);
MODULE_PARM_DESC(power_level,
"default power save level (range from 1 - 5, default: 1)");
module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
bool, S_IRUGO);
MODULE_PARM_DESC(auto_agg,
"enable agg w/o check traffic load (default: enable)");
/*
* For now, keep using power level 1 instead of automatically
* adjusting ...
*/
module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
bool, S_IRUGO);
MODULE_PARM_DESC(no_sleep_autoadjust,
"don't automatically adjust sleep level "
"according to maximum network latency (default: true)");
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