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android-kvm / linux / fcad584d12831864727aef917190fc3e24cfe541 / . / drivers / net / wireless / iwlwifi / iwl-core.c
blob: fa3d5bacbde2c836382e4648d3239ba784f9ce2b [file] [log] [blame]
/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 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 LICENSE.GPL.
*
* 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/etherdevice.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <net/mac80211.h>
#include "iwl-eeprom.h"
#include "iwl-dev.h" /* FIXME: remove */
#include "iwl-debug.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-power.h"
#include "iwl-sta.h"
#include "iwl-helpers.h"
#include "iwl-agn.h"
#include "iwl-trans.h"
u32 iwl_debug_level;
const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
struct ieee80211_sta_ht_cap *ht_info,
enum ieee80211_band band)
{
u16 max_bit_rate = 0;
u8 rx_chains_num = priv->hw_params.rx_chains_num;
u8 tx_chains_num = priv->hw_params.tx_chains_num;
ht_info->cap = 0;
memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
ht_info->ht_supported = true;
if (priv->cfg->ht_params &&
priv->cfg->ht_params->ht_greenfield_support)
ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
max_bit_rate = MAX_BIT_RATE_20_MHZ;
if (priv->hw_params.ht40_channel & BIT(band)) {
ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
ht_info->mcs.rx_mask[4] = 0x01;
max_bit_rate = MAX_BIT_RATE_40_MHZ;
}
if (iwlagn_mod_params.amsdu_size_8K)
ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
ht_info->mcs.rx_mask[0] = 0xFF;
if (rx_chains_num >= 2)
ht_info->mcs.rx_mask[1] = 0xFF;
if (rx_chains_num >= 3)
ht_info->mcs.rx_mask[2] = 0xFF;
/* Highest supported Rx data rate */
max_bit_rate *= rx_chains_num;
WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
/* Tx MCS capabilities */
ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
if (tx_chains_num != rx_chains_num) {
ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
}
}
/**
* iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
*/
int iwlcore_init_geos(struct iwl_priv *priv)
{
struct iwl_channel_info *ch;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *channels;
struct ieee80211_channel *geo_ch;
struct ieee80211_rate *rates;
int i = 0;
s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
channels = kzalloc(sizeof(struct ieee80211_channel) *
priv->channel_count, GFP_KERNEL);
if (!channels)
return -ENOMEM;
rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
GFP_KERNEL);
if (!rates) {
kfree(channels);
return -ENOMEM;
}
/* 5.2GHz channels start after the 2.4GHz channels */
sband = &priv->bands[IEEE80211_BAND_5GHZ];
sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
/* just OFDM */
sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
IEEE80211_BAND_5GHZ);
sband = &priv->bands[IEEE80211_BAND_2GHZ];
sband->channels = channels;
/* OFDM & CCK */
sband->bitrates = rates;
sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
IEEE80211_BAND_2GHZ);
priv->ieee_channels = channels;
priv->ieee_rates = rates;
for (i = 0; i < priv->channel_count; i++) {
ch = &priv->channel_info[i];
/* FIXME: might be removed if scan is OK */
if (!is_channel_valid(ch))
continue;
sband = &priv->bands[ch->band];
geo_ch = &sband->channels[sband->n_channels++];
geo_ch->center_freq =
ieee80211_channel_to_frequency(ch->channel, ch->band);
geo_ch->max_power = ch->max_power_avg;
geo_ch->max_antenna_gain = 0xff;
geo_ch->hw_value = ch->channel;
if (is_channel_valid(ch)) {
if (!(ch->flags & EEPROM_CHANNEL_IBSS))
geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
if (ch->flags & EEPROM_CHANNEL_RADAR)
geo_ch->flags |= IEEE80211_CHAN_RADAR;
geo_ch->flags |= ch->ht40_extension_channel;
if (ch->max_power_avg > max_tx_power)
max_tx_power = ch->max_power_avg;
} else {
geo_ch->flags |= IEEE80211_CHAN_DISABLED;
}
IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
ch->channel, geo_ch->center_freq,
is_channel_a_band(ch) ? "5.2" : "2.4",
geo_ch->flags & IEEE80211_CHAN_DISABLED ?
"restricted" : "valid",
geo_ch->flags);
}
priv->tx_power_device_lmt = max_tx_power;
priv->tx_power_user_lmt = max_tx_power;
priv->tx_power_next = max_tx_power;
if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
char buf[32];
priv->bus.ops->get_hw_id(&priv->bus, buf, sizeof(buf));
IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
"Please send your %s to maintainer.\n", buf);
priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
}
IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
priv->bands[IEEE80211_BAND_2GHZ].n_channels,
priv->bands[IEEE80211_BAND_5GHZ].n_channels);
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
/*
* iwlcore_free_geos - undo allocations in iwlcore_init_geos
*/
void iwlcore_free_geos(struct iwl_priv *priv)
{
kfree(priv->ieee_channels);
kfree(priv->ieee_rates);
clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
static bool iwl_is_channel_extension(struct iwl_priv *priv,
enum ieee80211_band band,
u16 channel, u8 extension_chan_offset)
{
const struct iwl_channel_info *ch_info;
ch_info = iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info))
return false;
if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
return !(ch_info->ht40_extension_channel &
IEEE80211_CHAN_NO_HT40PLUS);
else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
return !(ch_info->ht40_extension_channel &
IEEE80211_CHAN_NO_HT40MINUS);
return false;
}
bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_sta_ht_cap *ht_cap)
{
if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
return false;
/*
* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
* the bit will not set if it is pure 40MHz case
*/
if (ht_cap && !ht_cap->ht_supported)
return false;
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (priv->disable_ht40)
return false;
#endif
return iwl_is_channel_extension(priv, priv->band,
le16_to_cpu(ctx->staging.channel),
ctx->ht.extension_chan_offset);
}
static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
{
u16 new_val;
u16 beacon_factor;
/*
* If mac80211 hasn't given us a beacon interval, program
* the default into the device (not checking this here
* would cause the adjustment below to return the maximum
* value, which may break PAN.)
*/
if (!beacon_val)
return DEFAULT_BEACON_INTERVAL;
/*
* If the beacon interval we obtained from the peer
* is too large, we'll have to wake up more often
* (and in IBSS case, we'll beacon too much)
*
* For example, if max_beacon_val is 4096, and the
* requested beacon interval is 7000, we'll have to
* use 3500 to be able to wake up on the beacons.
*
* This could badly influence beacon detection stats.
*/
beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
new_val = beacon_val / beacon_factor;
if (!new_val)
new_val = max_beacon_val;
return new_val;
}
int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
u64 tsf;
s32 interval_tm, rem;
struct ieee80211_conf *conf = NULL;
u16 beacon_int;
struct ieee80211_vif *vif = ctx->vif;
conf = ieee80211_get_hw_conf(priv->hw);
lockdep_assert_held(&priv->mutex);
memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
beacon_int = vif ? vif->bss_conf.beacon_int : 0;
/*
* TODO: For IBSS we need to get atim_window from mac80211,
* for now just always use 0
*/
ctx->timing.atim_window = 0;
if (ctx->ctxid == IWL_RXON_CTX_PAN &&
(!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
priv->contexts[IWL_RXON_CTX_BSS].vif &&
priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
ctx->timing.beacon_interval =
priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
} else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
priv->contexts[IWL_RXON_CTX_PAN].vif &&
priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
(!iwl_is_associated_ctx(ctx) || !ctx->vif ||
!ctx->vif->bss_conf.beacon_int)) {
ctx->timing.beacon_interval =
priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
} else {
beacon_int = iwl_adjust_beacon_interval(beacon_int,
priv->hw_params.max_beacon_itrvl * TIME_UNIT);
ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
}
tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
interval_tm = beacon_int * TIME_UNIT;
rem = do_div(tsf, interval_tm);
ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
IWL_DEBUG_ASSOC(priv,
"beacon interval %d beacon timer %d beacon tim %d\n",
le16_to_cpu(ctx->timing.beacon_interval),
le32_to_cpu(ctx->timing.beacon_init_val),
le16_to_cpu(ctx->timing.atim_window));
return trans_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
}
void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
int hw_decrypt)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
if (hw_decrypt)
rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
else
rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
}
/* validate RXON structure is valid */
int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
u32 errors = 0;
if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
IWL_WARN(priv, "check 2.4G: wrong narrow\n");
errors |= BIT(0);
}
if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
IWL_WARN(priv, "check 2.4G: wrong radar\n");
errors |= BIT(1);
}
} else {
if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
IWL_WARN(priv, "check 5.2G: not short slot!\n");
errors |= BIT(2);
}
if (rxon->flags & RXON_FLG_CCK_MSK) {
IWL_WARN(priv, "check 5.2G: CCK!\n");
errors |= BIT(3);
}
}
if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
IWL_WARN(priv, "mac/bssid mcast!\n");
errors |= BIT(4);
}
/* make sure basic rates 6Mbps and 1Mbps are supported */
if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
(rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
IWL_WARN(priv, "neither 1 nor 6 are basic\n");
errors |= BIT(5);
}
if (le16_to_cpu(rxon->assoc_id) > 2007) {
IWL_WARN(priv, "aid > 2007\n");
errors |= BIT(6);
}
if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
IWL_WARN(priv, "CCK and short slot\n");
errors |= BIT(7);
}
if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
IWL_WARN(priv, "CCK and auto detect");
errors |= BIT(8);
}
if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
RXON_FLG_TGG_PROTECT_MSK)) ==
RXON_FLG_TGG_PROTECT_MSK) {
IWL_WARN(priv, "TGg but no auto-detect\n");
errors |= BIT(9);
}
if (rxon->channel == 0) {
IWL_WARN(priv, "zero channel is invalid\n");
errors |= BIT(10);
}
WARN(errors, "Invalid RXON (%#x), channel %d",
errors, le16_to_cpu(rxon->channel));
return errors ? -EINVAL : 0;
}
/**
* iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
* @priv: staging_rxon is compared to active_rxon
*
* If the RXON structure is changing enough to require a new tune,
* or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
* a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
*/
int iwl_full_rxon_required(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
const struct iwl_rxon_cmd *staging = &ctx->staging;
const struct iwl_rxon_cmd *active = &ctx->active;
#define CHK(cond) \
if ((cond)) { \
IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
return 1; \
}
#define CHK_NEQ(c1, c2) \
if ((c1) != (c2)) { \
IWL_DEBUG_INFO(priv, "need full RXON - " \
#c1 " != " #c2 " - %d != %d\n", \
(c1), (c2)); \
return 1; \
}
/* These items are only settable from the full RXON command */
CHK(!iwl_is_associated_ctx(ctx));
CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
CHK(compare_ether_addr(staging->node_addr, active->node_addr));
CHK(compare_ether_addr(staging->wlap_bssid_addr,
active->wlap_bssid_addr));
CHK_NEQ(staging->dev_type, active->dev_type);
CHK_NEQ(staging->channel, active->channel);
CHK_NEQ(staging->air_propagation, active->air_propagation);
CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
active->ofdm_ht_single_stream_basic_rates);
CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
active->ofdm_ht_dual_stream_basic_rates);
CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
active->ofdm_ht_triple_stream_basic_rates);
CHK_NEQ(staging->assoc_id, active->assoc_id);
/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
* be updated with the RXON_ASSOC command -- however only some
* flag transitions are allowed using RXON_ASSOC */
/* Check if we are not switching bands */
CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
active->flags & RXON_FLG_BAND_24G_MSK);
/* Check if we are switching association toggle */
CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
active->filter_flags & RXON_FILTER_ASSOC_MSK);
#undef CHK
#undef CHK_NEQ
return 0;
}
static void _iwl_set_rxon_ht(struct iwl_priv *priv,
struct iwl_ht_config *ht_conf,
struct iwl_rxon_context *ctx)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
if (!ctx->ht.enabled) {
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
RXON_FLG_HT40_PROT_MSK |
RXON_FLG_HT_PROT_MSK);
return;
}
/* FIXME: if the definition of ht.protection changed, the "translation"
* will be needed for rxon->flags
*/
rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
/* Set up channel bandwidth:
* 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
/* clear the HT channel mode before set the mode */
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
/* pure ht40 */
if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
/* Note: control channel is opposite of extension channel */
switch (ctx->ht.extension_chan_offset) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
break;
}
} else {
/* Note: control channel is opposite of extension channel */
switch (ctx->ht.extension_chan_offset) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
break;
case IEEE80211_HT_PARAM_CHA_SEC_NONE:
default:
/* channel location only valid if in Mixed mode */
IWL_ERR(priv, "invalid extension channel offset\n");
break;
}
}
} else {
rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
}
iwlagn_set_rxon_chain(priv, ctx);
IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
"extension channel offset 0x%x\n",
le32_to_cpu(rxon->flags), ctx->ht.protection,
ctx->ht.extension_chan_offset);
}
void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
{
struct iwl_rxon_context *ctx;
for_each_context(priv, ctx)
_iwl_set_rxon_ht(priv, ht_conf, ctx);
}
/* Return valid, unused, channel for a passive scan to reset the RF */
u8 iwl_get_single_channel_number(struct iwl_priv *priv,
enum ieee80211_band band)
{
const struct iwl_channel_info *ch_info;
int i;
u8 channel = 0;
u8 min, max;
struct iwl_rxon_context *ctx;
if (band == IEEE80211_BAND_5GHZ) {
min = 14;
max = priv->channel_count;
} else {
min = 0;
max = 14;
}
for (i = min; i < max; i++) {
bool busy = false;
for_each_context(priv, ctx) {
busy = priv->channel_info[i].channel ==
le16_to_cpu(ctx->staging.channel);
if (busy)
break;
}
if (busy)
continue;
channel = priv->channel_info[i].channel;
ch_info = iwl_get_channel_info(priv, band, channel);
if (is_channel_valid(ch_info))
break;
}
return channel;
}
/**
* iwl_set_rxon_channel - Set the band and channel values in staging RXON
* @ch: requested channel as a pointer to struct ieee80211_channel
* NOTE: Does not commit to the hardware; it sets appropriate bit fields
* in the staging RXON flag structure based on the ch->band
*/
int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
struct iwl_rxon_context *ctx)
{
enum ieee80211_band band = ch->band;
u16 channel = ch->hw_value;
if ((le16_to_cpu(ctx->staging.channel) == channel) &&
(priv->band == band))
return 0;
ctx->staging.channel = cpu_to_le16(channel);
if (band == IEEE80211_BAND_5GHZ)
ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
else
ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
priv->band = band;
IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
return 0;
}
void iwl_set_flags_for_band(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
enum ieee80211_band band,
struct ieee80211_vif *vif)
{
if (band == IEEE80211_BAND_5GHZ) {
ctx->staging.flags &=
~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
| RXON_FLG_CCK_MSK);
ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
} else {
/* Copied from iwl_post_associate() */
if (vif && vif->bss_conf.use_short_slot)
ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
}
}
/*
* initialize rxon structure with default values from eeprom
*/
void iwl_connection_init_rx_config(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
const struct iwl_channel_info *ch_info;
memset(&ctx->staging, 0, sizeof(ctx->staging));
if (!ctx->vif) {
ctx->staging.dev_type = ctx->unused_devtype;
} else switch (ctx->vif->type) {
case NL80211_IFTYPE_AP:
ctx->staging.dev_type = ctx->ap_devtype;
break;
case NL80211_IFTYPE_STATION:
ctx->staging.dev_type = ctx->station_devtype;
ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
break;
case NL80211_IFTYPE_ADHOC:
ctx->staging.dev_type = ctx->ibss_devtype;
ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
RXON_FILTER_ACCEPT_GRP_MSK;
break;
default:
IWL_ERR(priv, "Unsupported interface type %d\n",
ctx->vif->type);
break;
}
#if 0
/* TODO: Figure out when short_preamble would be set and cache from
* that */
if (!hw_to_local(priv->hw)->short_preamble)
ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
else
ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif
ch_info = iwl_get_channel_info(priv, priv->band,
le16_to_cpu(ctx->active.channel));
if (!ch_info)
ch_info = &priv->channel_info[0];
ctx->staging.channel = cpu_to_le16(ch_info->channel);
priv->band = ch_info->band;
iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
ctx->staging.ofdm_basic_rates =
(IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
ctx->staging.cck_basic_rates =
(IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
/* clear both MIX and PURE40 mode flag */
ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
RXON_FLG_CHANNEL_MODE_PURE_40);
if (ctx->vif)
memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
}
void iwl_set_rate(struct iwl_priv *priv)
{
const struct ieee80211_supported_band *hw = NULL;
struct ieee80211_rate *rate;
struct iwl_rxon_context *ctx;
int i;
hw = iwl_get_hw_mode(priv, priv->band);
if (!hw) {
IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
return;
}
priv->active_rate = 0;
for (i = 0; i < hw->n_bitrates; i++) {
rate = &(hw->bitrates[i]);
if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
priv->active_rate |= (1 << rate->hw_value);
}
IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
for_each_context(priv, ctx) {
ctx->staging.cck_basic_rates =
(IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
ctx->staging.ofdm_basic_rates =
(IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}
}
void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
{
/*
* MULTI-FIXME
* See iwl_mac_channel_switch.
*/
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
ieee80211_chswitch_done(ctx->vif, is_success);
}
#ifdef CONFIG_IWLWIFI_DEBUG
void iwl_print_rx_config_cmd(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
le32_to_cpu(rxon->filter_flags));
IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
rxon->ofdm_basic_rates);
IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif
static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
{
unsigned long flags;
struct iwl_notification_wait *wait_entry;
spin_lock_irqsave(&priv->_agn.notif_wait_lock, flags);
list_for_each_entry(wait_entry, &priv->_agn.notif_waits, list)
wait_entry->aborted = true;
spin_unlock_irqrestore(&priv->_agn.notif_wait_lock, flags);
wake_up_all(&priv->_agn.notif_waitq);
}
void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
{
unsigned int reload_msec;
unsigned long reload_jiffies;
/* Set the FW error flag -- cleared on iwl_down */
set_bit(STATUS_FW_ERROR, &priv->status);
/* Cancel currently queued command. */
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
iwlagn_abort_notification_waits(priv);
/* Keep the restart process from trying to send host
* commands by clearing the ready bit */
clear_bit(STATUS_READY, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
if (!ondemand) {
/*
* If firmware keep reloading, then it indicate something
* serious wrong and firmware having problem to recover
* from it. Instead of keep trying which will fill the syslog
* and hang the system, let's just stop it
*/
reload_jiffies = jiffies;
reload_msec = jiffies_to_msecs((long) reload_jiffies -
(long) priv->reload_jiffies);
priv->reload_jiffies = reload_jiffies;
if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
priv->reload_count++;
if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
IWL_ERR(priv, "BUG_ON, Stop restarting\n");
return;
}
} else
priv->reload_count = 0;
}
if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
if (iwlagn_mod_params.restart_fw) {
IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
"Restarting adapter due to uCode error.\n");
queue_work(priv->workqueue, &priv->restart);
} else
IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
"Detected FW error, but not restarting\n");
}
}
/**
* iwl_irq_handle_error - called for HW or SW error interrupt from card
*/
void iwl_irq_handle_error(struct iwl_priv *priv)
{
/* W/A for WiFi/WiMAX coex and WiMAX own the RF */
if (priv->cfg->internal_wimax_coex &&
(!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
APMS_CLK_VAL_MRB_FUNC_MODE) ||
(iwl_read_prph(priv, APMG_PS_CTRL_REG) &
APMG_PS_CTRL_VAL_RESET_REQ))) {
/*
* Keep the restart process from trying to send host
* commands by clearing the ready bit.
*/
clear_bit(STATUS_READY, &priv->status);
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
IWL_ERR(priv, "RF is used by WiMAX\n");
return;
}
IWL_ERR(priv, "Loaded firmware version: %s\n",
priv->hw->wiphy->fw_version);
iwl_dump_nic_error_log(priv);
iwl_dump_csr(priv);
iwl_dump_fh(priv, NULL, false);
iwl_dump_nic_event_log(priv, false, NULL, false);
#ifdef CONFIG_IWLWIFI_DEBUG
if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
iwl_print_rx_config_cmd(priv,
&priv->contexts[IWL_RXON_CTX_BSS]);
#endif
iwlagn_fw_error(priv, false);
}
static int iwl_apm_stop_master(struct iwl_priv *priv)
{
int ret = 0;
/* stop device's busmaster DMA activity */
iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
if (ret)
IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
IWL_DEBUG_INFO(priv, "stop master\n");
return ret;
}
void iwl_apm_stop(struct iwl_priv *priv)
{
IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
clear_bit(STATUS_DEVICE_ENABLED, &priv->status);
/* Stop device's DMA activity */
iwl_apm_stop_master(priv);
/* Reset the entire device */
iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
/*
* Clear "initialization complete" bit to move adapter from
* D0A* (powered-up Active) --> D0U* (Uninitialized) state.
*/
iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
}
/*
* Start up NIC's basic functionality after it has been reset
* (e.g. after platform boot, or shutdown via iwl_apm_stop())
* NOTE: This does not load uCode nor start the embedded processor
*/
int iwl_apm_init(struct iwl_priv *priv)
{
int ret = 0;
IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
/*
* Use "set_bit" below rather than "write", to preserve any hardware
* bits already set by default after reset.
*/
/* Disable L0S exit timer (platform NMI Work/Around) */
iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
/*
* Disable L0s without affecting L1;
* don't wait for ICH L0s (ICH bug W/A)
*/
iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
/* Set FH wait threshold to maximum (HW error during stress W/A) */
iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
/*
* Enable HAP INTA (interrupt from management bus) to
* wake device's PCI Express link L1a -> L0s
*/
iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
priv->bus.ops->apm_config(&priv->bus);
/* Configure analog phase-lock-loop before activating to D0A */
if (priv->cfg->base_params->pll_cfg_val)
iwl_set_bit(priv, CSR_ANA_PLL_CFG,
priv->cfg->base_params->pll_cfg_val);
/*
* Set "initialization complete" bit to move adapter from
* D0U* --> D0A* (powered-up active) state.
*/
iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
/*
* Wait for clock stabilization; once stabilized, access to
* device-internal resources is supported, e.g. iwl_write_prph()
* and accesses to uCode SRAM.
*/
ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
if (ret < 0) {
IWL_DEBUG_INFO(priv, "Failed to init the card\n");
goto out;
}
/*
* Enable DMA clock and wait for it to stabilize.
*
* Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
* do not disable clocks. This preserves any hardware bits already
* set by default in "CLK_CTRL_REG" after reset.
*/
iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
udelay(20);
/* Disable L1-Active */
iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
set_bit(STATUS_DEVICE_ENABLED, &priv->status);
out:
return ret;
}
int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
int ret;
s8 prev_tx_power;
bool defer;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
lockdep_assert_held(&priv->mutex);
if (priv->tx_power_user_lmt == tx_power && !force)
return 0;
if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
IWL_WARN(priv,
"Requested user TXPOWER %d below lower limit %d.\n",
tx_power,
IWLAGN_TX_POWER_TARGET_POWER_MIN);
return -EINVAL;
}
if (tx_power > priv->tx_power_device_lmt) {
IWL_WARN(priv,
"Requested user TXPOWER %d above upper limit %d.\n",
tx_power, priv->tx_power_device_lmt);
return -EINVAL;
}
if (!iwl_is_ready_rf(priv))
return -EIO;
/* scan complete and commit_rxon use tx_power_next value,
* it always need to be updated for newest request */
priv->tx_power_next = tx_power;
/* do not set tx power when scanning or channel changing */
defer = test_bit(STATUS_SCANNING, &priv->status) ||
memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
if (defer && !force) {
IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
return 0;
}
prev_tx_power = priv->tx_power_user_lmt;
priv->tx_power_user_lmt = tx_power;
ret = iwlagn_send_tx_power(priv);
/* if fail to set tx_power, restore the orig. tx power */
if (ret) {
priv->tx_power_user_lmt = prev_tx_power;
priv->tx_power_next = prev_tx_power;
}
return ret;
}
void iwl_send_bt_config(struct iwl_priv *priv)
{
struct iwl_bt_cmd bt_cmd = {
.lead_time = BT_LEAD_TIME_DEF,
.max_kill = BT_MAX_KILL_DEF,
.kill_ack_mask = 0,
.kill_cts_mask = 0,
};
if (!iwlagn_mod_params.bt_coex_active)
bt_cmd.flags = BT_COEX_DISABLE;
else
bt_cmd.flags = BT_COEX_ENABLE;
priv->bt_enable_flag = bt_cmd.flags;
IWL_DEBUG_INFO(priv, "BT coex %s\n",
(bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
if (trans_send_cmd_pdu(priv, REPLY_BT_CONFIG,
CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
IWL_ERR(priv, "failed to send BT Coex Config\n");
}
int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
{
struct iwl_statistics_cmd statistics_cmd = {
.configuration_flags =
clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
};
if (flags & CMD_ASYNC)
return trans_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
CMD_ASYNC,
sizeof(struct iwl_statistics_cmd),
&statistics_cmd);
else
return trans_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
CMD_SYNC,
sizeof(struct iwl_statistics_cmd),
&statistics_cmd);
}
void iwl_clear_isr_stats(struct iwl_priv *priv)
{
memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
}
int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct iwl_priv *priv = hw->priv;
struct iwl_rxon_context *ctx;
unsigned long flags;
int q;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
return -EIO;
}
if (queue >= AC_NUM) {
IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
return 0;
}
q = AC_NUM - 1 - queue;
spin_lock_irqsave(&priv->lock, flags);
/*
* MULTI-FIXME
* This may need to be done per interface in nl80211/cfg80211/mac80211.
*/
for_each_context(priv, ctx) {
ctx->qos_data.def_qos_parm.ac[q].cw_min =
cpu_to_le16(params->cw_min);
ctx->qos_data.def_qos_parm.ac[q].cw_max =
cpu_to_le16(params->cw_max);
ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
ctx->qos_data.def_qos_parm.ac[q].edca_txop =
cpu_to_le16((params->txop * 32));
ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
}
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
return priv->ibss_manager == IWL_IBSS_MANAGER;
}
static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
iwl_connection_init_rx_config(priv, ctx);
iwlagn_set_rxon_chain(priv, ctx);
return iwlagn_commit_rxon(priv, ctx);
}
static int iwl_setup_interface(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct ieee80211_vif *vif = ctx->vif;
int err;
lockdep_assert_held(&priv->mutex);
/*
* This variable will be correct only when there's just
* a single context, but all code using it is for hardware
* that supports only one context.
*/
priv->iw_mode = vif->type;
ctx->is_active = true;
err = iwl_set_mode(priv, ctx);
if (err) {
if (!ctx->always_active)
ctx->is_active = false;
return err;
}
if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
vif->type == NL80211_IFTYPE_ADHOC) {
/*
* pretend to have high BT traffic as long as we
* are operating in IBSS mode, as this will cause
* the rate scaling etc. to behave as intended.
*/
priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
}
return 0;
}
int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
struct iwl_priv *priv = hw->priv;
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
struct iwl_rxon_context *tmp, *ctx = NULL;
int err;
enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
viftype, vif->addr);
mutex_lock(&priv->mutex);
if (!iwl_is_ready_rf(priv)) {
IWL_WARN(priv, "Try to add interface when device not ready\n");
err = -EINVAL;
goto out;
}
for_each_context(priv, tmp) {
u32 possible_modes =
tmp->interface_modes | tmp->exclusive_interface_modes;
if (tmp->vif) {
/* check if this busy context is exclusive */
if (tmp->exclusive_interface_modes &
BIT(tmp->vif->type)) {
err = -EINVAL;
goto out;
}
continue;
}
if (!(possible_modes & BIT(viftype)))
continue;
/* have maybe usable context w/o interface */
ctx = tmp;
break;
}
if (!ctx) {
err = -EOPNOTSUPP;
goto out;
}
vif_priv->ctx = ctx;
ctx->vif = vif;
err = iwl_setup_interface(priv, ctx);
if (!err)
goto out;
ctx->vif = NULL;
priv->iw_mode = NL80211_IFTYPE_STATION;
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return err;
}
static void iwl_teardown_interface(struct iwl_priv *priv,
struct ieee80211_vif *vif,
bool mode_change)
{
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
lockdep_assert_held(&priv->mutex);
if (priv->scan_vif == vif) {
iwl_scan_cancel_timeout(priv, 200);
iwl_force_scan_end(priv);
}
if (!mode_change) {
iwl_set_mode(priv, ctx);
if (!ctx->always_active)
ctx->is_active = false;
}
/*
* When removing the IBSS interface, overwrite the
* BT traffic load with the stored one from the last
* notification, if any. If this is a device that
* doesn't implement this, this has no effect since
* both values are the same and zero.
*/
if (vif->type == NL80211_IFTYPE_ADHOC)
priv->bt_traffic_load = priv->last_bt_traffic_load;
}
void iwl_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_priv *priv = hw->priv;
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
WARN_ON(ctx->vif != vif);
ctx->vif = NULL;
iwl_teardown_interface(priv, vif, false);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
#define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
void iwl_reset_traffic_log(struct iwl_priv *priv)
{
priv->tx_traffic_idx = 0;
priv->rx_traffic_idx = 0;
if (priv->tx_traffic)
memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
if (priv->rx_traffic)
memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
}
int iwl_alloc_traffic_mem(struct iwl_priv *priv)
{
u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
if (iwl_debug_level & IWL_DL_TX) {
if (!priv->tx_traffic) {
priv->tx_traffic =
kzalloc(traffic_size, GFP_KERNEL);
if (!priv->tx_traffic)
return -ENOMEM;
}
}
if (iwl_debug_level & IWL_DL_RX) {
if (!priv->rx_traffic) {
priv->rx_traffic =
kzalloc(traffic_size, GFP_KERNEL);
if (!priv->rx_traffic)
return -ENOMEM;
}
}
iwl_reset_traffic_log(priv);
return 0;
}
void iwl_free_traffic_mem(struct iwl_priv *priv)
{
kfree(priv->tx_traffic);
priv->tx_traffic = NULL;
kfree(priv->rx_traffic);
priv->rx_traffic = NULL;
}
void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
u16 length, struct ieee80211_hdr *header)
{
__le16 fc;
u16 len;
if (likely(!(iwl_debug_level & IWL_DL_TX)))
return;
if (!priv->tx_traffic)
return;
fc = header->frame_control;
if (ieee80211_is_data(fc)) {
len = (length > IWL_TRAFFIC_ENTRY_SIZE)
? IWL_TRAFFIC_ENTRY_SIZE : length;
memcpy((priv->tx_traffic +
(priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
header, len);
priv->tx_traffic_idx =
(priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
}
}
void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
u16 length, struct ieee80211_hdr *header)
{
__le16 fc;
u16 len;
if (likely(!(iwl_debug_level & IWL_DL_RX)))
return;
if (!priv->rx_traffic)
return;
fc = header->frame_control;
if (ieee80211_is_data(fc)) {
len = (length > IWL_TRAFFIC_ENTRY_SIZE)
? IWL_TRAFFIC_ENTRY_SIZE : length;
memcpy((priv->rx_traffic +
(priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
header, len);
priv->rx_traffic_idx =
(priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
}
}
const char *get_mgmt_string(int cmd)
{
switch (cmd) {
IWL_CMD(MANAGEMENT_ASSOC_REQ);
IWL_CMD(MANAGEMENT_ASSOC_RESP);
IWL_CMD(MANAGEMENT_REASSOC_REQ);
IWL_CMD(MANAGEMENT_REASSOC_RESP);
IWL_CMD(MANAGEMENT_PROBE_REQ);
IWL_CMD(MANAGEMENT_PROBE_RESP);
IWL_CMD(MANAGEMENT_BEACON);
IWL_CMD(MANAGEMENT_ATIM);
IWL_CMD(MANAGEMENT_DISASSOC);
IWL_CMD(MANAGEMENT_AUTH);
IWL_CMD(MANAGEMENT_DEAUTH);
IWL_CMD(MANAGEMENT_ACTION);
default:
return "UNKNOWN";
}
}
const char *get_ctrl_string(int cmd)
{
switch (cmd) {
IWL_CMD(CONTROL_BACK_REQ);
IWL_CMD(CONTROL_BACK);
IWL_CMD(CONTROL_PSPOLL);
IWL_CMD(CONTROL_RTS);
IWL_CMD(CONTROL_CTS);
IWL_CMD(CONTROL_ACK);
IWL_CMD(CONTROL_CFEND);
IWL_CMD(CONTROL_CFENDACK);
default:
return "UNKNOWN";
}
}
void iwl_clear_traffic_stats(struct iwl_priv *priv)
{
memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
}
/*
* if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
* record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
* Use debugFs to display the rx/rx_statistics
* if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
* information will be recorded, but DATA pkt still will be recorded
* for the reason of iwl_led.c need to control the led blinking based on
* number of tx and rx data.
*
*/
void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
{
struct traffic_stats *stats;
if (is_tx)
stats = &priv->tx_stats;
else
stats = &priv->rx_stats;
if (ieee80211_is_mgmt(fc)) {
switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
break;
case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
break;
case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
break;
case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
break;
case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
stats->mgmt[MANAGEMENT_PROBE_REQ]++;
break;
case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
stats->mgmt[MANAGEMENT_PROBE_RESP]++;
break;
case cpu_to_le16(IEEE80211_STYPE_BEACON):
stats->mgmt[MANAGEMENT_BEACON]++;
break;
case cpu_to_le16(IEEE80211_STYPE_ATIM):
stats->mgmt[MANAGEMENT_ATIM]++;
break;
case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
stats->mgmt[MANAGEMENT_DISASSOC]++;
break;
case cpu_to_le16(IEEE80211_STYPE_AUTH):
stats->mgmt[MANAGEMENT_AUTH]++;
break;
case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
stats->mgmt[MANAGEMENT_DEAUTH]++;
break;
case cpu_to_le16(IEEE80211_STYPE_ACTION):
stats->mgmt[MANAGEMENT_ACTION]++;
break;
}
} else if (ieee80211_is_ctl(fc)) {
switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
stats->ctrl[CONTROL_BACK_REQ]++;
break;
case cpu_to_le16(IEEE80211_STYPE_BACK):
stats->ctrl[CONTROL_BACK]++;
break;
case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
stats->ctrl[CONTROL_PSPOLL]++;
break;
case cpu_to_le16(IEEE80211_STYPE_RTS):
stats->ctrl[CONTROL_RTS]++;
break;
case cpu_to_le16(IEEE80211_STYPE_CTS):
stats->ctrl[CONTROL_CTS]++;
break;
case cpu_to_le16(IEEE80211_STYPE_ACK):
stats->ctrl[CONTROL_ACK]++;
break;
case cpu_to_le16(IEEE80211_STYPE_CFEND):
stats->ctrl[CONTROL_CFEND]++;
break;
case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
stats->ctrl[CONTROL_CFENDACK]++;
break;
}
} else {
/* data */
stats->data_cnt++;
stats->data_bytes += len;
}
}
#endif
static void iwl_force_rf_reset(struct iwl_priv *priv)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!iwl_is_any_associated(priv)) {
IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
return;
}
/*
* There is no easy and better way to force reset the radio,
* the only known method is switching channel which will force to
* reset and tune the radio.
* Use internal short scan (single channel) operation to should
* achieve this objective.
* Driver should reset the radio when number of consecutive missed
* beacon, or any other uCode error condition detected.
*/
IWL_DEBUG_INFO(priv, "perform radio reset.\n");
iwl_internal_short_hw_scan(priv);
}
int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
{
struct iwl_force_reset *force_reset;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return -EINVAL;
if (mode >= IWL_MAX_FORCE_RESET) {
IWL_DEBUG_INFO(priv, "invalid reset request.\n");
return -EINVAL;
}
force_reset = &priv->force_reset[mode];
force_reset->reset_request_count++;
if (!external) {
if (force_reset->last_force_reset_jiffies &&
time_after(force_reset->last_force_reset_jiffies +
force_reset->reset_duration, jiffies)) {
IWL_DEBUG_INFO(priv, "force reset rejected\n");
force_reset->reset_reject_count++;
return -EAGAIN;
}
}
force_reset->reset_success_count++;
force_reset->last_force_reset_jiffies = jiffies;
IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
switch (mode) {
case IWL_RF_RESET:
iwl_force_rf_reset(priv);
break;
case IWL_FW_RESET:
/*
* if the request is from external(ex: debugfs),
* then always perform the request in regardless the module
* parameter setting
* if the request is from internal (uCode error or driver
* detect failure), then fw_restart module parameter
* need to be check before performing firmware reload
*/
if (!external && !iwlagn_mod_params.restart_fw) {
IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
"module parameter setting\n");
break;
}
IWL_ERR(priv, "On demand firmware reload\n");
iwlagn_fw_error(priv, true);
break;
}
return 0;
}
int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
enum nl80211_iftype newtype, bool newp2p)
{
struct iwl_priv *priv = hw->priv;
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
struct iwl_rxon_context *tmp;
enum nl80211_iftype newviftype = newtype;
u32 interface_modes;
int err;
newtype = ieee80211_iftype_p2p(newtype, newp2p);
mutex_lock(&priv->mutex);
if (!ctx->vif || !iwl_is_ready_rf(priv)) {
/*
* Huh? But wait ... this can maybe happen when
* we're in the middle of a firmware restart!
*/
err = -EBUSY;
goto out;
}
interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
if (!(interface_modes & BIT(newtype))) {
err = -EBUSY;
goto out;
}
/*
* Refuse a change that should be done by moving from the PAN
* context to the BSS context instead, if the BSS context is
* available and can support the new interface type.
*/
if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
(bss_ctx->interface_modes & BIT(newtype) ||
bss_ctx->exclusive_interface_modes & BIT(newtype))) {
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
err = -EBUSY;
goto out;
}
if (ctx->exclusive_interface_modes & BIT(newtype)) {
for_each_context(priv, tmp) {
if (ctx == tmp)
continue;
if (!tmp->vif)
continue;
/*
* The current mode switch would be exclusive, but
* another context is active ... refuse the switch.
*/
err = -EBUSY;
goto out;
}
}
/* success */
iwl_teardown_interface(priv, vif, true);
vif->type = newviftype;
vif->p2p = newp2p;
err = iwl_setup_interface(priv, ctx);
WARN_ON(err);
/*
* We've switched internally, but submitting to the
* device may have failed for some reason. Mask this
* error, because otherwise mac80211 will not switch
* (and set the interface type back) and we'll be
* out of sync with it.
*/
err = 0;
out:
mutex_unlock(&priv->mutex);
return err;
}
/*
* On every watchdog tick we check (latest) time stamp. If it does not
* change during timeout period and queue is not empty we reset firmware.
*/
static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
{
struct iwl_tx_queue *txq = &priv->txq[cnt];
struct iwl_queue *q = &txq->q;
unsigned long timeout;
int ret;
if (q->read_ptr == q->write_ptr) {
txq->time_stamp = jiffies;
return 0;
}
timeout = txq->time_stamp +
msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
if (time_after(jiffies, timeout)) {
IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
q->id, priv->cfg->base_params->wd_timeout);
ret = iwl_force_reset(priv, IWL_FW_RESET, false);
return (ret == -EAGAIN) ? 0 : 1;
}
return 0;
}
/*
* Making watchdog tick be a quarter of timeout assure we will
* discover the queue hung between timeout and 1.25*timeout
*/
#define IWL_WD_TICK(timeout) ((timeout) / 4)
/*
* Watchdog timer callback, we check each tx queue for stuck, if if hung
* we reset the firmware. If everything is fine just rearm the timer.
*/
void iwl_bg_watchdog(unsigned long data)
{
struct iwl_priv *priv = (struct iwl_priv *)data;
int cnt;
unsigned long timeout;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
timeout = priv->cfg->base_params->wd_timeout;
if (timeout == 0)
return;
/* monitor and check for stuck cmd queue */
if (iwl_check_stuck_queue(priv, priv->cmd_queue))
return;
/* monitor and check for other stuck queues */
if (iwl_is_any_associated(priv)) {
for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
/* skip as we already checked the command queue */
if (cnt == priv->cmd_queue)
continue;
if (iwl_check_stuck_queue(priv, cnt))
return;
}
}
mod_timer(&priv->watchdog, jiffies +
msecs_to_jiffies(IWL_WD_TICK(timeout)));
}
void iwl_setup_watchdog(struct iwl_priv *priv)
{
unsigned int timeout = priv->cfg->base_params->wd_timeout;
if (timeout && !iwlagn_mod_params.wd_disable)
mod_timer(&priv->watchdog,
jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
else
del_timer(&priv->watchdog);
}
/*
* extended beacon time format
* time in usec will be changed into a 32-bit value in extended:internal format
* the extended part is the beacon counts
* the internal part is the time in usec within one beacon interval
*/
u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
{
u32 quot;
u32 rem;
u32 interval = beacon_interval * TIME_UNIT;
if (!interval || !usec)
return 0;
quot = (usec / interval) &
(iwl_beacon_time_mask_high(priv,
priv->hw_params.beacon_time_tsf_bits) >>
priv->hw_params.beacon_time_tsf_bits);
rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
priv->hw_params.beacon_time_tsf_bits);
return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
}
/* base is usually what we get from ucode with each received frame,
* the same as HW timer counter counting down
*/
__le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
u32 addon, u32 beacon_interval)
{
u32 base_low = base & iwl_beacon_time_mask_low(priv,
priv->hw_params.beacon_time_tsf_bits);
u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
priv->hw_params.beacon_time_tsf_bits);
u32 interval = beacon_interval * TIME_UNIT;
u32 res = (base & iwl_beacon_time_mask_high(priv,
priv->hw_params.beacon_time_tsf_bits)) +
(addon & iwl_beacon_time_mask_high(priv,
priv->hw_params.beacon_time_tsf_bits));
if (base_low > addon_low)
res += base_low - addon_low;
else if (base_low < addon_low) {
res += interval + base_low - addon_low;
res += (1 << priv->hw_params.beacon_time_tsf_bits);
} else
res += (1 << priv->hw_params.beacon_time_tsf_bits);
return cpu_to_le32(res);
}
#ifdef CONFIG_PM
int iwl_suspend(struct iwl_priv *priv)
{
/*
* This function is called when system goes into suspend state
* mac80211 will call iwl_mac_stop() from the mac80211 suspend function
* first but since iwl_mac_stop() has no knowledge of who the caller is,
* it will not call apm_ops.stop() to stop the DMA operation.
* Calling apm_ops.stop here to make sure we stop the DMA.
*/
iwl_apm_stop(priv);
return 0;
}
int iwl_resume(struct iwl_priv *priv)
{
bool hw_rfkill = false;
iwl_enable_interrupts(priv);
if (!(iwl_read32(priv, CSR_GP_CNTRL) &
CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
hw_rfkill = true;
if (hw_rfkill)
set_bit(STATUS_RF_KILL_HW, &priv->status);
else
clear_bit(STATUS_RF_KILL_HW, &priv->status);
wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
return 0;
}
#endif /* CONFIG_PM */