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linux/drivers/net/wireless/iwlwifi/iwl-core.c
Luis R. Rodriguez 371842448c cfg80211: fix regression on beacon world roaming feature 
A regression was added through patch a4ed90d6:

"cfg80211: respect API on orig_flags on channel for beacon hint"

We did indeed respect _orig flags but the intention was not clearly
stated in the commit log. This patch fixes firmware issues picked
up by iwlwifi when we lift passive scan of beaconing restrictions
on channels its EEPROM has been configured to always enable.

By doing so though we also disallowed beacon hints on devices
registering their wiphy with custom world regulatory domains
enabled, this happens to be currently ath5k, ath9k and ar9170.
The passive scan and beacon restrictions on those devices would
never be lifted even if we did find a beacon and the hardware did
support such enhancements when world roaming.

Since Johannes indicates iwlwifi firmware cannot be changed to
allow beacon hinting we set up a flag now to specifically allow
drivers to disable beacon hints for devices which cannot use them.

We enable the flag on iwlwifi to disable beacon hints and by default
enable it for all other drivers. It should be noted beacon hints lift
passive scan flags and beacon restrictions when we receive a beacon from
an AP on any 5 GHz non-DFS channels, and channels 12-14 on the 2.4 GHz
band. We don't bother with channels 1-11 as those channels are allowed
world wide.

This should fix world roaming for ath5k, ath9k and ar9170, thereby
improving scan time when we receive the first beacon from any AP,
and also enabling beaconing operation (AP/IBSS/Mesh) on cards which
would otherwise not be allowed to do so. Drivers not using custom
regulatory stuff (wiphy_apply_custom_regulatory()) were not affected
by this as the orig_flags for the channels would have been cleared
upon wiphy registration.

I tested this with a world roaming ath5k card.

Cc: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-08-03 16:31:21 -04:00

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/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2009 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 <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"
MODULE_DESCRIPTION("iwl core");
MODULE_VERSION(IWLWIFI_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
IWL_RATE_SISO_##s##M_PLCP, \
IWL_RATE_MIMO2_##s##M_PLCP,\
IWL_RATE_MIMO3_##s##M_PLCP,\
IWL_RATE_##r##M_IEEE, \
IWL_RATE_##ip##M_INDEX, \
IWL_RATE_##in##M_INDEX, \
IWL_RATE_##rp##M_INDEX, \
IWL_RATE_##rn##M_INDEX, \
IWL_RATE_##pp##M_INDEX, \
IWL_RATE_##np##M_INDEX }
static irqreturn_t iwl_isr(int irq, void *data);
/*
* Parameter order:
* rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
*
* If there isn't a valid next or previous rate then INV is used which
* maps to IWL_RATE_INVALID
*
*/
const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
/* FIXME:RS: ^^ should be INV (legacy) */
};
EXPORT_SYMBOL(iwl_rates);
/**
* translate ucode response to mac80211 tx status control values
*/
void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
struct ieee80211_tx_info *info)
{
int rate_index;
struct ieee80211_tx_rate *r = &info->control.rates[0];
info->antenna_sel_tx =
((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
if (rate_n_flags & RATE_MCS_HT_MSK)
r->flags |= IEEE80211_TX_RC_MCS;
if (rate_n_flags & RATE_MCS_GF_MSK)
r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
if (rate_n_flags & RATE_MCS_FAT_MSK)
r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
if (rate_n_flags & RATE_MCS_DUP_MSK)
r->flags |= IEEE80211_TX_RC_DUP_DATA;
if (rate_n_flags & RATE_MCS_SGI_MSK)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
if (info->band == IEEE80211_BAND_5GHZ)
rate_index -= IWL_FIRST_OFDM_RATE;
r->idx = rate_index;
}
EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
{
int idx = 0;
/* HT rate format */
if (rate_n_flags & RATE_MCS_HT_MSK) {
idx = (rate_n_flags & 0xff);
if (idx >= IWL_RATE_MIMO3_6M_PLCP)
idx = idx - IWL_RATE_MIMO3_6M_PLCP;
else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
idx = idx - IWL_RATE_MIMO2_6M_PLCP;
idx += IWL_FIRST_OFDM_RATE;
/* skip 9M not supported in ht*/
if (idx >= IWL_RATE_9M_INDEX)
idx += 1;
if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
return idx;
/* legacy rate format, search for match in table */
} else {
for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
return idx;
}
return -1;
}
EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
{
int i;
u8 ind = ant;
for (i = 0; i < RATE_ANT_NUM - 1; i++) {
ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
if (priv->hw_params.valid_tx_ant & BIT(ind))
return ind;
}
return ant;
}
const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
EXPORT_SYMBOL(iwl_bcast_addr);
/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
struct ieee80211_ops *hw_ops)
{
struct iwl_priv *priv;
/* mac80211 allocates memory for this device instance, including
* space for this driver's private structure */
struct ieee80211_hw *hw =
ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
if (hw == NULL) {
printk(KERN_ERR "%s: Can not allocate network device\n",
cfg->name);
goto out;
}
priv = hw->priv;
priv->hw = hw;
out:
return hw;
}
EXPORT_SYMBOL(iwl_alloc_all);
void iwl_hw_detect(struct iwl_priv *priv)
{
priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
}
EXPORT_SYMBOL(iwl_hw_detect);
int iwl_hw_nic_init(struct iwl_priv *priv)
{
unsigned long flags;
struct iwl_rx_queue *rxq = &priv->rxq;
int ret;
/* nic_init */
spin_lock_irqsave(&priv->lock, flags);
priv->cfg->ops->lib->apm_ops.init(priv);
iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
spin_unlock_irqrestore(&priv->lock, flags);
ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
priv->cfg->ops->lib->apm_ops.config(priv);
/* Allocate the RX queue, or reset if it is already allocated */
if (!rxq->bd) {
ret = iwl_rx_queue_alloc(priv);
if (ret) {
IWL_ERR(priv, "Unable to initialize Rx queue\n");
return -ENOMEM;
}
} else
iwl_rx_queue_reset(priv, rxq);
iwl_rx_replenish(priv);
iwl_rx_init(priv, rxq);
spin_lock_irqsave(&priv->lock, flags);
rxq->need_update = 1;
iwl_rx_queue_update_write_ptr(priv, rxq);
spin_unlock_irqrestore(&priv->lock, flags);
/* Allocate and init all Tx and Command queues */
ret = iwl_txq_ctx_reset(priv);
if (ret)
return ret;
set_bit(STATUS_INIT, &priv->status);
return 0;
}
EXPORT_SYMBOL(iwl_hw_nic_init);
/*
* QoS support
*/
void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
priv->qos_data.def_qos_parm.qos_flags = 0;
if (priv->qos_data.qos_cap.q_AP.queue_request &&
!priv->qos_data.qos_cap.q_AP.txop_request)
priv->qos_data.def_qos_parm.qos_flags |=
QOS_PARAM_FLG_TXOP_TYPE_MSK;
if (priv->qos_data.qos_active)
priv->qos_data.def_qos_parm.qos_flags |=
QOS_PARAM_FLG_UPDATE_EDCA_MSK;
if (priv->current_ht_config.is_ht)
priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
if (force || iwl_is_associated(priv)) {
IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
priv->qos_data.qos_active,
priv->qos_data.def_qos_parm.qos_flags);
iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
sizeof(struct iwl_qosparam_cmd),
&priv->qos_data.def_qos_parm, NULL);
}
}
EXPORT_SYMBOL(iwl_activate_qos);
/*
* AC CWmin CW max AIFSN TXOP Limit TXOP Limit
* (802.11b) (802.11a/g)
* AC_BK 15 1023 7 0 0
* AC_BE 15 1023 3 0 0
* AC_VI 7 15 2 6.016ms 3.008ms
* AC_VO 3 7 2 3.264ms 1.504ms
*/
void iwl_reset_qos(struct iwl_priv *priv)
{
u16 cw_min = 15;
u16 cw_max = 1023;
u8 aifs = 2;
bool is_legacy = false;
unsigned long flags;
int i;
spin_lock_irqsave(&priv->lock, flags);
/* QoS always active in AP and ADHOC mode
* In STA mode wait for association
*/
if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
priv->iw_mode == NL80211_IFTYPE_AP)
priv->qos_data.qos_active = 1;
else
priv->qos_data.qos_active = 0;
/* check for legacy mode */
if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
(priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
(priv->iw_mode == NL80211_IFTYPE_STATION &&
(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
cw_min = 31;
is_legacy = 1;
}
if (priv->qos_data.qos_active)
aifs = 3;
/* AC_BE */
priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
if (priv->qos_data.qos_active) {
/* AC_BK */
i = 1;
priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
/* AC_VI */
i = 2;
priv->qos_data.def_qos_parm.ac[i].cw_min =
cpu_to_le16((cw_min + 1) / 2 - 1);
priv->qos_data.def_qos_parm.ac[i].cw_max =
cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
if (is_legacy)
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(6016);
else
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(3008);
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
/* AC_VO */
i = 3;
priv->qos_data.def_qos_parm.ac[i].cw_min =
cpu_to_le16((cw_min + 1) / 4 - 1);
priv->qos_data.def_qos_parm.ac[i].cw_max =
cpu_to_le16((cw_min + 1) / 2 - 1);
priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
if (is_legacy)
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(3264);
else
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(1504);
} else {
for (i = 1; i < 4; i++) {
priv->qos_data.def_qos_parm.ac[i].cw_min =
cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[i].cw_max =
cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
}
}
IWL_DEBUG_QOS(priv, "set QoS to default \n");
spin_unlock_irqrestore(&priv->lock, flags);
}
EXPORT_SYMBOL(iwl_reset_qos);
#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;
ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
(WLAN_HT_CAP_SM_PS_DISABLED << 2));
max_bit_rate = MAX_BIT_RATE_20_MHZ;
if (priv->hw_params.fat_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 (priv->cfg->mod_params->amsdu_size_8K)
ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
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);
}
}
static void iwlcore_init_hw_rates(struct iwl_priv *priv,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT; 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_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_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;
}
}
}
/**
* 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;
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 + 1)),
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 - IWL_FIRST_OFDM_RATE;
if (priv->cfg->sku & IWL_SKU_N)
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;
if (priv->cfg->sku & IWL_SKU_N)
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;
if (is_channel_a_band(ch))
sband = &priv->bands[IEEE80211_BAND_5GHZ];
else
sband = &priv->bands[IEEE80211_BAND_2GHZ];
geo_ch = &sband->channels[sband->n_channels++];
geo_ch->center_freq =
ieee80211_channel_to_frequency(ch->channel);
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->fat_extension_channel;
if (ch->max_power_avg > priv->tx_power_channel_lmt)
priv->tx_power_channel_lmt = ch->max_power_avg;
} else {
geo_ch->flags |= IEEE80211_CHAN_DISABLED;
}
/* Save flags for reg domain usage */
geo_ch->orig_flags = geo_ch->flags;
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);
}
if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
priv->cfg->sku & IWL_SKU_A) {
IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
"Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
priv->pci_dev->device,
priv->pci_dev->subsystem_device);
priv->cfg->sku &= ~IWL_SKU_A;
}
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;
}
EXPORT_SYMBOL(iwlcore_init_geos);
/*
* 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);
}
EXPORT_SYMBOL(iwlcore_free_geos);
static bool is_single_rx_stream(struct iwl_priv *priv)
{
return !priv->current_ht_config.is_ht ||
((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
(priv->current_ht_config.mcs.rx_mask[2] == 0));
}
static u8 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 0;
if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
return !(ch_info->fat_extension_channel &
IEEE80211_CHAN_NO_HT40PLUS);
else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
return !(ch_info->fat_extension_channel &
IEEE80211_CHAN_NO_HT40MINUS);
return 0;
}
u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
struct ieee80211_sta_ht_cap *sta_ht_inf)
{
struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
if ((!iwl_ht_conf->is_ht) ||
(iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ))
return 0;
/* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
* the bit will not set if it is pure 40MHz case
*/
if (sta_ht_inf) {
if (!sta_ht_inf->ht_supported)
return 0;
}
return iwl_is_channel_extension(priv, priv->band,
le16_to_cpu(priv->staging_rxon.channel),
iwl_ht_conf->extension_chan_offset);
}
EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
if (hw_decrypt)
rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
else
rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
}
EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
/**
* iwl_check_rxon_cmd - validate RXON structure is valid
*
* NOTE: This is really only useful during development and can eventually
* be #ifdef'd out once the driver is stable and folks aren't actively
* making changes
*/
int iwl_check_rxon_cmd(struct iwl_priv *priv)
{
int error = 0;
int counter = 1;
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
error |= le32_to_cpu(rxon->flags &
(RXON_FLG_TGJ_NARROW_BAND_MSK |
RXON_FLG_RADAR_DETECT_MSK));
if (error)
IWL_WARN(priv, "check 24G fields %d | %d\n",
counter++, error);
} else {
error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
if (error)
IWL_WARN(priv, "check 52 fields %d | %d\n",
counter++, error);
error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
if (error)
IWL_WARN(priv, "check 52 CCK %d | %d\n",
counter++, error);
}
error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
if (error)
IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
/* make sure basic rates 6Mbps and 1Mbps are supported */
error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
if (error)
IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
error |= (le16_to_cpu(rxon->assoc_id) > 2007);
if (error)
IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
if (error)
IWL_WARN(priv, "check CCK and short slot %d | %d\n",
counter++, error);
error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
if (error)
IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
counter++, error);
error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
if (error)
IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
counter++, error);
if (error)
IWL_WARN(priv, "Tuning to channel %d\n",
le16_to_cpu(rxon->channel));
if (error) {
IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
return -1;
}
return 0;
}
EXPORT_SYMBOL(iwl_check_rxon_cmd);
/**
* 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)
{
/* These items are only settable from the full RXON command */
if (!(iwl_is_associated(priv)) ||
compare_ether_addr(priv->staging_rxon.bssid_addr,
priv->active_rxon.bssid_addr) ||
compare_ether_addr(priv->staging_rxon.node_addr,
priv->active_rxon.node_addr) ||
compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
priv->active_rxon.wlap_bssid_addr) ||
(priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
(priv->staging_rxon.channel != priv->active_rxon.channel) ||
(priv->staging_rxon.air_propagation !=
priv->active_rxon.air_propagation) ||
(priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
(priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
(priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
(priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
return 1;
/* 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 */
if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
(priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
return 1;
/* Check if we are switching association toggle */
if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
return 1;
return 0;
}
EXPORT_SYMBOL(iwl_full_rxon_required);
u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
{
int i;
int rate_mask;
/* Set rate mask*/
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
else
rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
/* Find lowest valid rate */
for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
i = iwl_rates[i].next_ieee) {
if (rate_mask & (1 << i))
return iwl_rates[i].plcp;
}
/* No valid rate was found. Assign the lowest one */
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
return IWL_RATE_1M_PLCP;
else
return IWL_RATE_6M_PLCP;
}
EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
{
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
if (!ht_info->is_ht) {
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
RXON_FLG_FAT_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(ht_info->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
/* Set up channel bandwidth:
* 20 MHz only, 20/40 mixed or pure 40 if fat 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_fat_tx_allowed(priv, NULL)) {
/* pure 40 fat */
if (ht_info->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 (ht_info->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 (ht_info->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;
}
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv);
IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
"rxon flags 0x%X operation mode :0x%X "
"extension channel offset 0x%x\n",
ht_info->mcs.rx_mask[0],
ht_info->mcs.rx_mask[1],
ht_info->mcs.rx_mask[2],
le32_to_cpu(rxon->flags), ht_info->ht_protection,
ht_info->extension_chan_offset);
return;
}
EXPORT_SYMBOL(iwl_set_rxon_ht);
#define IWL_NUM_RX_CHAINS_MULTIPLE 3
#define IWL_NUM_RX_CHAINS_SINGLE 2
#define IWL_NUM_IDLE_CHAINS_DUAL 2
#define IWL_NUM_IDLE_CHAINS_SINGLE 1
/* Determine how many receiver/antenna chains to use.
* More provides better reception via diversity. Fewer saves power.
* MIMO (dual stream) requires at least 2, but works better with 3.
* This does not determine *which* chains to use, just how many.
*/
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
{
bool is_single = is_single_rx_stream(priv);
bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
/* # of Rx chains to use when expecting MIMO. */
if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
WLAN_HT_CAP_SM_PS_STATIC)))
return IWL_NUM_RX_CHAINS_SINGLE;
else
return IWL_NUM_RX_CHAINS_MULTIPLE;
}
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
int idle_cnt;
bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
/* # Rx chains when idling and maybe trying to save power */
switch (priv->current_ht_config.sm_ps) {
case WLAN_HT_CAP_SM_PS_STATIC:
case WLAN_HT_CAP_SM_PS_DYNAMIC:
idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
IWL_NUM_IDLE_CHAINS_SINGLE;
break;
case WLAN_HT_CAP_SM_PS_DISABLED:
idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
break;
case WLAN_HT_CAP_SM_PS_INVALID:
default:
IWL_ERR(priv, "invalid mimo ps mode %d\n",
priv->current_ht_config.sm_ps);
WARN_ON(1);
idle_cnt = -1;
break;
}
return idle_cnt;
}
/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
u8 res;
res = (chain_bitmap & BIT(0)) >> 0;
res += (chain_bitmap & BIT(1)) >> 1;
res += (chain_bitmap & BIT(2)) >> 2;
res += (chain_bitmap & BIT(4)) >> 4;
return res;
}
/**
* iwl_is_monitor_mode - Determine if interface in monitor mode
*
* priv->iw_mode is set in add_interface, but add_interface is
* never called for monitor mode. The only way mac80211 informs us about
* monitor mode is through configuring filters (call to configure_filter).
*/
bool iwl_is_monitor_mode(struct iwl_priv *priv)
{
return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
}
EXPORT_SYMBOL(iwl_is_monitor_mode);
/**
* iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
*
* Selects how many and which Rx receivers/antennas/chains to use.
* This should not be used for scan command ... it puts data in wrong place.
*/
void iwl_set_rxon_chain(struct iwl_priv *priv)
{
bool is_single = is_single_rx_stream(priv);
bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
u32 active_chains;
u16 rx_chain;
/* Tell uCode which antennas are actually connected.
* Before first association, we assume all antennas are connected.
* Just after first association, iwl_chain_noise_calibration()
* checks which antennas actually *are* connected. */
if (priv->chain_noise_data.active_chains)
active_chains = priv->chain_noise_data.active_chains;
else
active_chains = priv->hw_params.valid_rx_ant;
rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
/* How many receivers should we use? */
active_rx_cnt = iwl_get_active_rx_chain_count(priv);
idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
/* correct rx chain count according hw settings
* and chain noise calibration
*/
valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
if (valid_rx_cnt < active_rx_cnt)
active_rx_cnt = valid_rx_cnt;
if (valid_rx_cnt < idle_rx_cnt)
idle_rx_cnt = valid_rx_cnt;
rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
/* copied from 'iwl_bg_request_scan()' */
/* Force use of chains B and C (0x6) for Rx for 4965
* Avoid A (0x1) because of its off-channel reception on A-band.
* MIMO is not used here, but value is required */
if (iwl_is_monitor_mode(priv) &&
!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
}
priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
else
priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
priv->staging_rxon.rx_chain,
active_rx_cnt, idle_rx_cnt);
WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
active_rx_cnt < idle_rx_cnt);
}
EXPORT_SYMBOL(iwl_set_rxon_chain);
/**
* iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
* @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
* @channel: Any channel valid for the requested phymode
* In addition to setting the staging RXON, priv->phymode is also set.
*
* NOTE: Does not commit to the hardware; it sets appropriate bit fields
* in the staging RXON flag structure based on the phymode
*/
int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
{
enum ieee80211_band band = ch->band;
u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
if (!iwl_get_channel_info(priv, band, channel)) {
IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
channel, band);
return -EINVAL;
}
if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
(priv->band == band))
return 0;
priv->staging_rxon.channel = cpu_to_le16(channel);
if (band == IEEE80211_BAND_5GHZ)
priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
else
priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
priv->band = band;
IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
return 0;
}
EXPORT_SYMBOL(iwl_set_rxon_channel);
void iwl_set_flags_for_band(struct iwl_priv *priv,
enum ieee80211_band band)
{
if (band == IEEE80211_BAND_5GHZ) {
priv->staging_rxon.flags &=
~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
| RXON_FLG_CCK_MSK);
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
} else {
/* Copied from iwl_post_associate() */
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
}
}
EXPORT_SYMBOL(iwl_set_flags_for_band);
/*
* initialize rxon structure with default values from eeprom
*/
void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
{
const struct iwl_channel_info *ch_info;
memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
switch (mode) {
case NL80211_IFTYPE_AP:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
break;
case NL80211_IFTYPE_STATION:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
break;
case NL80211_IFTYPE_ADHOC:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
RXON_FILTER_ACCEPT_GRP_MSK;
break;
default:
IWL_ERR(priv, "Unsupported interface type %d\n", mode);
break;
}
#if 0
/* TODO: Figure out when short_preamble would be set and cache from
* that */
if (!hw_to_local(priv->hw)->short_preamble)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif
ch_info = iwl_get_channel_info(priv, priv->band,
le16_to_cpu(priv->active_rxon.channel));
if (!ch_info)
ch_info = &priv->channel_info[0];
/*
* in some case A channels are all non IBSS
* in this case force B/G channel
*/
if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
!(is_channel_ibss(ch_info)))
ch_info = &priv->channel_info[0];
priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
priv->band = ch_info->band;
iwl_set_flags_for_band(priv, priv->band);
priv->staging_rxon.ofdm_basic_rates =
(IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
priv->staging_rxon.cck_basic_rates =
(IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
/* clear both MIX and PURE40 mode flag */
priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
RXON_FLG_CHANNEL_MODE_PURE_40);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
}
EXPORT_SYMBOL(iwl_connection_init_rx_config);
static void iwl_set_rate(struct iwl_priv *priv)
{
const struct ieee80211_supported_band *hw = NULL;
struct ieee80211_rate *rate;
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;
priv->active_rate_basic = 0;
for (i = 0; i < hw->n_bitrates; i++) {
rate = &(hw->bitrates[i]);
if (rate->hw_value < IWL_RATE_COUNT)
priv->active_rate |= (1 << rate->hw_value);
}
IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
priv->active_rate, priv->active_rate_basic);
/*
* If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
* otherwise set it to the default of all CCK rates and 6, 12, 24 for
* OFDM
*/
if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
priv->staging_rxon.cck_basic_rates =
((priv->active_rate_basic &
IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
else
priv->staging_rxon.cck_basic_rates =
(IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
priv->staging_rxon.ofdm_basic_rates =
((priv->active_rate_basic &
(IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
IWL_FIRST_OFDM_RATE) & 0xFF;
else
priv->staging_rxon.ofdm_basic_rates =
(IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}
void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
rxon->channel = csa->channel;
priv->staging_rxon.channel = csa->channel;
}
EXPORT_SYMBOL(iwl_rx_csa);
#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
{
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
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
/**
* iwl_irq_handle_error - called for HW or SW error interrupt from card
*/
void iwl_irq_handle_error(struct iwl_priv *priv)
{
/* 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);
#ifdef CONFIG_IWLWIFI_DEBUG
if (priv->debug_level & IWL_DL_FW_ERRORS) {
iwl_dump_nic_error_log(priv);
iwl_dump_nic_event_log(priv);
iwl_print_rx_config_cmd(priv);
}
#endif
wake_up_interruptible(&priv->wait_command_queue);
/* Keep the restart process from trying to send host
* commands by clearing the INIT status bit */
clear_bit(STATUS_READY, &priv->status);
if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
"Restarting adapter due to uCode error.\n");
if (priv->cfg->mod_params->restart_fw)
queue_work(priv->workqueue, &priv->restart);
}
}
EXPORT_SYMBOL(iwl_irq_handle_error);
void iwl_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
int mc_count, struct dev_addr_list *mc_list)
{
struct iwl_priv *priv = hw->priv;
__le32 *filter_flags = &priv->staging_rxon.filter_flags;
IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
changed_flags, *total_flags);
if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
*filter_flags |= RXON_FILTER_PROMISC_MSK;
else
*filter_flags &= ~RXON_FILTER_PROMISC_MSK;
}
if (changed_flags & FIF_ALLMULTI) {
if (*total_flags & FIF_ALLMULTI)
*filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
else
*filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
}
if (changed_flags & FIF_CONTROL) {
if (*total_flags & FIF_CONTROL)
*filter_flags |= RXON_FILTER_CTL2HOST_MSK;
else
*filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
}
if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
*filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
else
*filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
}
/* We avoid iwl_commit_rxon here to commit the new filter flags
* since mac80211 will call ieee80211_hw_config immediately.
* (mc_list is not supported at this time). Otherwise, we need to
* queue a background iwl_commit_rxon work.
*/
*total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}
EXPORT_SYMBOL(iwl_configure_filter);
int iwl_setup_mac(struct iwl_priv *priv)
{
int ret;
struct ieee80211_hw *hw = priv->hw;
hw->rate_control_algorithm = "iwl-agn-rs";
/* Tell mac80211 our characteristics */
hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM |
IEEE80211_HW_AMPDU_AGGREGATION |
IEEE80211_HW_SPECTRUM_MGMT;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC);
hw->wiphy->custom_regulatory = true;
/* Firmware does not support this */
hw->wiphy->disable_beacon_hints = true;
hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
/* we create the 802.11 header and a zero-length SSID element */
hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
/* Default value; 4 EDCA QOS priorities */
hw->queues = 4;
hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&priv->bands[IEEE80211_BAND_2GHZ];
if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&priv->bands[IEEE80211_BAND_5GHZ];
ret = ieee80211_register_hw(priv->hw);
if (ret) {
IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
return ret;
}
priv->mac80211_registered = 1;
return 0;
}
EXPORT_SYMBOL(iwl_setup_mac);
int iwl_set_hw_params(struct iwl_priv *priv)
{
priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
if (priv->cfg->mod_params->amsdu_size_8K)
priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
else
priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
if (priv->cfg->mod_params->disable_11n)
priv->cfg->sku &= ~IWL_SKU_N;
/* Device-specific setup */
return priv->cfg->ops->lib->set_hw_params(priv);
}
EXPORT_SYMBOL(iwl_set_hw_params);
int iwl_init_drv(struct iwl_priv *priv)
{
int ret;
priv->ibss_beacon = NULL;
spin_lock_init(&priv->lock);
spin_lock_init(&priv->sta_lock);
spin_lock_init(&priv->hcmd_lock);
INIT_LIST_HEAD(&priv->free_frames);
mutex_init(&priv->mutex);
/* Clear the driver's (not device's) station table */
iwl_clear_stations_table(priv);
priv->data_retry_limit = -1;
priv->ieee_channels = NULL;
priv->ieee_rates = NULL;
priv->band = IEEE80211_BAND_2GHZ;
priv->iw_mode = NL80211_IFTYPE_STATION;
priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
/* Choose which receivers/antennas to use */
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv);
iwl_init_scan_params(priv);
iwl_reset_qos(priv);
priv->qos_data.qos_active = 0;
priv->qos_data.qos_cap.val = 0;
priv->rates_mask = IWL_RATES_MASK;
/* If power management is turned on, default to CAM mode */
priv->power_mode = IWL_POWER_MODE_CAM;
priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
ret = iwl_init_channel_map(priv);
if (ret) {
IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
goto err;
}
ret = iwlcore_init_geos(priv);
if (ret) {
IWL_ERR(priv, "initializing geos failed: %d\n", ret);
goto err_free_channel_map;
}
iwlcore_init_hw_rates(priv, priv->ieee_rates);
return 0;
err_free_channel_map:
iwl_free_channel_map(priv);
err:
return ret;
}
EXPORT_SYMBOL(iwl_init_drv);
int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
int ret = 0;
if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
tx_power,
IWL_TX_POWER_TARGET_POWER_MIN);
return -EINVAL;
}
if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n",
tx_power,
IWL_TX_POWER_TARGET_POWER_MAX);
return -EINVAL;
}
if (priv->tx_power_user_lmt != tx_power)
force = true;
priv->tx_power_user_lmt = tx_power;
/* if nic is not up don't send command */
if (!iwl_is_ready_rf(priv))
return ret;
if (force && priv->cfg->ops->lib->send_tx_power)
ret = priv->cfg->ops->lib->send_tx_power(priv);
return ret;
}
EXPORT_SYMBOL(iwl_set_tx_power);
void iwl_uninit_drv(struct iwl_priv *priv)
{
iwl_calib_free_results(priv);
iwlcore_free_geos(priv);
iwl_free_channel_map(priv);
kfree(priv->scan);
}
EXPORT_SYMBOL(iwl_uninit_drv);
void iwl_disable_interrupts(struct iwl_priv *priv)
{
clear_bit(STATUS_INT_ENABLED, &priv->status);
/* disable interrupts from uCode/NIC to host */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* acknowledge/clear/reset any interrupts still pending
* from uCode or flow handler (Rx/Tx DMA) */
iwl_write32(priv, CSR_INT, 0xffffffff);
iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
IWL_DEBUG_ISR(priv, "Disabled interrupts\n");
}
EXPORT_SYMBOL(iwl_disable_interrupts);
void iwl_enable_interrupts(struct iwl_priv *priv)
{
IWL_DEBUG_ISR(priv, "Enabling interrupts\n");
set_bit(STATUS_INT_ENABLED, &priv->status);
iwl_write32(priv, CSR_INT_MASK, priv->inta_mask);
}
EXPORT_SYMBOL(iwl_enable_interrupts);
#define ICT_COUNT (PAGE_SIZE/sizeof(u32))
/* Free dram table */
void iwl_free_isr_ict(struct iwl_priv *priv)
{
if (priv->ict_tbl_vir) {
pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
PAGE_SIZE, priv->ict_tbl_vir,
priv->ict_tbl_dma);
priv->ict_tbl_vir = NULL;
}
}
EXPORT_SYMBOL(iwl_free_isr_ict);
/* allocate dram shared table it is a PAGE_SIZE aligned
* also reset all data related to ICT table interrupt.
*/
int iwl_alloc_isr_ict(struct iwl_priv *priv)
{
if (priv->cfg->use_isr_legacy)
return 0;
/* allocate shrared data table */
priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
ICT_COUNT) + PAGE_SIZE,
&priv->ict_tbl_dma);
if (!priv->ict_tbl_vir)
return -ENOMEM;
/* align table to PAGE_SIZE boundry */
priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
(unsigned long long)priv->ict_tbl_dma,
(unsigned long long)priv->aligned_ict_tbl_dma,
(int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
priv->ict_tbl = priv->ict_tbl_vir +
(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
priv->ict_tbl, priv->ict_tbl_vir,
(int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
/* reset table and index to all 0 */
memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
priv->ict_index = 0;
/* add periodic RX interrupt */
priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
return 0;
}
EXPORT_SYMBOL(iwl_alloc_isr_ict);
/* Device is going up inform it about using ICT interrupt table,
* also we need to tell the driver to start using ICT interrupt.
*/
int iwl_reset_ict(struct iwl_priv *priv)
{
u32 val;
unsigned long flags;
if (!priv->ict_tbl_vir)
return 0;
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
memset(&priv->ict_tbl[0],0, sizeof(u32) * ICT_COUNT);
val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
val |= CSR_DRAM_INT_TBL_ENABLE;
val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
"aligned dma address %Lx\n",
val, (unsigned long long)priv->aligned_ict_tbl_dma);
iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
priv->use_ict = true;
priv->ict_index = 0;
iwl_write32(priv, CSR_INT, priv->inta_mask);
iwl_enable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
EXPORT_SYMBOL(iwl_reset_ict);
/* Device is going down disable ict interrupt usage */
void iwl_disable_ict(struct iwl_priv *priv)
{
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
priv->use_ict = false;
spin_unlock_irqrestore(&priv->lock, flags);
}
EXPORT_SYMBOL(iwl_disable_ict);
/* interrupt handler using ict table, with this interrupt driver will
* stop using INTA register to get device's interrupt, reading this register
* is expensive, device will write interrupts in ICT dram table, increment
* index then will fire interrupt to driver, driver will OR all ICT table
* entries from current index up to table entry with 0 value. the result is
* the interrupt we need to service, driver will set the entries back to 0 and
* set index.
*/
irqreturn_t iwl_isr_ict(int irq, void *data)
{
struct iwl_priv *priv = data;
u32 inta, inta_mask;
u32 val = 0;
if (!priv)
return IRQ_NONE;
/* dram interrupt table not set yet,
* use legacy interrupt.
*/
if (!priv->use_ict)
return iwl_isr(irq, data);
spin_lock(&priv->lock);
/* Disable (but don't clear!) interrupts here to avoid
* back-to-back ISRs and sporadic interrupts from our NIC.
* If we have something to service, the tasklet will re-enable ints.
* If we *don't* have something, we'll re-enable before leaving here.
*/
inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* Ignore interrupt if there's nothing in NIC to service.
* This may be due to IRQ shared with another device,
* or due to sporadic interrupts thrown from our NIC. */
if (!priv->ict_tbl[priv->ict_index]) {
IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
goto none;
}
/* read all entries that not 0 start with ict_index */
while (priv->ict_tbl[priv->ict_index]) {
val |= priv->ict_tbl[priv->ict_index];
IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
priv->ict_index,
priv->ict_tbl[priv->ict_index]);
priv->ict_tbl[priv->ict_index] = 0;
priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
ICT_COUNT);
}
/* We should not get this value, just ignore it. */
if (val == 0xffffffff)
val = 0;
inta = (0xff & val) | ((0xff00 & val) << 16);
IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
inta, inta_mask, val);
inta &= priv->inta_mask;
priv->inta |= inta;
/* iwl_irq_tasklet() will service interrupts and re-enable them */
if (likely(inta))
tasklet_schedule(&priv->irq_tasklet);
else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
/* Allow interrupt if was disabled by this handler and
* no tasklet was schedules, We should not enable interrupt,
* tasklet will enable it.
*/
iwl_enable_interrupts(priv);
}
spin_unlock(&priv->lock);
return IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service.
* only Re-enable if disabled by irq.
*/
if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
iwl_enable_interrupts(priv);
spin_unlock(&priv->lock);
return IRQ_NONE;
}
EXPORT_SYMBOL(iwl_isr_ict);
static irqreturn_t iwl_isr(int irq, void *data)
{
struct iwl_priv *priv = data;
u32 inta, inta_mask;
#ifdef CONFIG_IWLWIFI_DEBUG
u32 inta_fh;
#endif
if (!priv)
return IRQ_NONE;
spin_lock(&priv->lock);
/* Disable (but don't clear!) interrupts here to avoid
* back-to-back ISRs and sporadic interrupts from our NIC.
* If we have something to service, the tasklet will re-enable ints.
* If we *don't* have something, we'll re-enable before leaving here. */
inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* Discover which interrupts are active/pending */
inta = iwl_read32(priv, CSR_INT);
/* Ignore interrupt if there's nothing in NIC to service.
* This may be due to IRQ shared with another device,
* or due to sporadic interrupts thrown from our NIC. */
if (!inta) {
IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
goto none;
}
if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
/* Hardware disappeared. It might have already raised
* an interrupt */
IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
goto unplugged;
}
#ifdef CONFIG_IWLWIFI_DEBUG
if (priv->debug_level & (IWL_DL_ISR)) {
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
"fh 0x%08x\n", inta, inta_mask, inta_fh);
}
#endif
priv->inta |= inta;
/* iwl_irq_tasklet() will service interrupts and re-enable them */
if (likely(inta))
tasklet_schedule(&priv->irq_tasklet);
else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
iwl_enable_interrupts(priv);
unplugged:
spin_unlock(&priv->lock);
return IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service. */
/* only Re-enable if diabled by irq and no schedules tasklet. */
if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
iwl_enable_interrupts(priv);
spin_unlock(&priv->lock);
return IRQ_NONE;
}
irqreturn_t iwl_isr_legacy(int irq, void *data)
{
struct iwl_priv *priv = data;
u32 inta, inta_mask;
u32 inta_fh;
if (!priv)
return IRQ_NONE;
spin_lock(&priv->lock);
/* Disable (but don't clear!) interrupts here to avoid
* back-to-back ISRs and sporadic interrupts from our NIC.
* If we have something to service, the tasklet will re-enable ints.
* If we *don't* have something, we'll re-enable before leaving here. */
inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* Discover which interrupts are active/pending */
inta = iwl_read32(priv, CSR_INT);
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
/* Ignore interrupt if there's nothing in NIC to service.
* This may be due to IRQ shared with another device,
* or due to sporadic interrupts thrown from our NIC. */
if (!inta && !inta_fh) {
IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
goto none;
}
if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
/* Hardware disappeared. It might have already raised
* an interrupt */
IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
goto unplugged;
}
IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
inta &= ~CSR_INT_BIT_SCD;
/* iwl_irq_tasklet() will service interrupts and re-enable them */
if (likely(inta || inta_fh))
tasklet_schedule(&priv->irq_tasklet);
unplugged:
spin_unlock(&priv->lock);
return IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service. */
/* only Re-enable if diabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl_enable_interrupts(priv);
spin_unlock(&priv->lock);
return IRQ_NONE;
}
EXPORT_SYMBOL(iwl_isr_legacy);
int iwl_send_bt_config(struct iwl_priv *priv)
{
struct iwl_bt_cmd bt_cmd = {
.flags = 3,
.lead_time = 0xAA,
.max_kill = 1,
.kill_ack_mask = 0,
.kill_cts_mask = 0,
};
return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
sizeof(struct iwl_bt_cmd), &bt_cmd);
}
EXPORT_SYMBOL(iwl_send_bt_config);
int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
{
u32 stat_flags = 0;
struct iwl_host_cmd cmd = {
.id = REPLY_STATISTICS_CMD,
.meta.flags = flags,
.len = sizeof(stat_flags),
.data = (u8 *) &stat_flags,
};
return iwl_send_cmd(priv, &cmd);
}
EXPORT_SYMBOL(iwl_send_statistics_request);
/**
* iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
* using sample data 100 bytes apart. If these sample points are good,
* it's a pretty good bet that everything between them is good, too.
*/
static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
u32 val;
int ret = 0;
u32 errcnt = 0;
u32 i;
IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
/* read data comes through single port, auto-incr addr */
/* NOTE: Use the debugless read so we don't flood kernel log
* if IWL_DL_IO is set */
iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
i + IWL49_RTC_INST_LOWER_BOUND);
val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
if (val != le32_to_cpu(*image)) {
ret = -EIO;
errcnt++;
if (errcnt >= 3)
break;
}
}
return ret;
}
/**
* iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
* looking at all data.
*/
static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
u32 len)
{
u32 val;
u32 save_len = len;
int ret = 0;
u32 errcnt;
IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
IWL49_RTC_INST_LOWER_BOUND);
errcnt = 0;
for (; len > 0; len -= sizeof(u32), image++) {
/* read data comes through single port, auto-incr addr */
/* NOTE: Use the debugless read so we don't flood kernel log
* if IWL_DL_IO is set */
val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
if (val != le32_to_cpu(*image)) {
IWL_ERR(priv, "uCode INST section is invalid at "
"offset 0x%x, is 0x%x, s/b 0x%x\n",
save_len - len, val, le32_to_cpu(*image));
ret = -EIO;
errcnt++;
if (errcnt >= 20)
break;
}
}
if (!errcnt)
IWL_DEBUG_INFO(priv,
"ucode image in INSTRUCTION memory is good\n");
return ret;
}
/**
* iwl_verify_ucode - determine which instruction image is in SRAM,
* and verify its contents
*/
int iwl_verify_ucode(struct iwl_priv *priv)
{
__le32 *image;
u32 len;
int ret;
/* Try bootstrap */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
ret = iwlcore_verify_inst_sparse(priv, image, len);
if (!ret) {
IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
return 0;
}
/* Try initialize */
image = (__le32 *)priv->ucode_init.v_addr;
len = priv->ucode_init.len;
ret = iwlcore_verify_inst_sparse(priv, image, len);
if (!ret) {
IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
return 0;
}
/* Try runtime/protocol */
image = (__le32 *)priv->ucode_code.v_addr;
len = priv->ucode_code.len;
ret = iwlcore_verify_inst_sparse(priv, image, len);
if (!ret) {
IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
return 0;
}
IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
/* Since nothing seems to match, show first several data entries in
* instruction SRAM, so maybe visual inspection will give a clue.
* Selection of bootstrap image (vs. other images) is arbitrary. */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
ret = iwl_verify_inst_full(priv, image, len);
return ret;
}
EXPORT_SYMBOL(iwl_verify_ucode);
static const char *desc_lookup_text[] = {
"OK",
"FAIL",
"BAD_PARAM",
"BAD_CHECKSUM",
"NMI_INTERRUPT_WDG",
"SYSASSERT",
"FATAL_ERROR",
"BAD_COMMAND",
"HW_ERROR_TUNE_LOCK",
"HW_ERROR_TEMPERATURE",
"ILLEGAL_CHAN_FREQ",
"VCC_NOT_STABLE",
"FH_ERROR",
"NMI_INTERRUPT_HOST",
"NMI_INTERRUPT_ACTION_PT",
"NMI_INTERRUPT_UNKNOWN",
"UCODE_VERSION_MISMATCH",
"HW_ERROR_ABS_LOCK",
"HW_ERROR_CAL_LOCK_FAIL",
"NMI_INTERRUPT_INST_ACTION_PT",
"NMI_INTERRUPT_DATA_ACTION_PT",
"NMI_TRM_HW_ER",
"NMI_INTERRUPT_TRM",
"NMI_INTERRUPT_BREAK_POINT"
"DEBUG_0",
"DEBUG_1",
"DEBUG_2",
"DEBUG_3",
"UNKNOWN"
};
static const char *desc_lookup(int i)
{
int max = ARRAY_SIZE(desc_lookup_text) - 1;
if (i < 0 || i > max)
i = max;
return desc_lookup_text[i];
}
#define ERROR_START_OFFSET (1 * sizeof(u32))
#define ERROR_ELEM_SIZE (7 * sizeof(u32))
void iwl_dump_nic_error_log(struct iwl_priv *priv)
{
u32 data2, line;
u32 desc, time, count, base, data1;
u32 blink1, blink2, ilink1, ilink2;
if (priv->ucode_type == UCODE_INIT)
base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
else
base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
return;
}
count = iwl_read_targ_mem(priv, base);
if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
IWL_ERR(priv, "Start IWL Error Log Dump:\n");
IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
priv->status, count);
}
desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
IWL_ERR(priv, "Desc Time "
"data1 data2 line\n");
IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
desc_lookup(desc), desc, time, data1, data2, line);
IWL_ERR(priv, "blink1 blink2 ilink1 ilink2\n");
IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
ilink1, ilink2);
}
EXPORT_SYMBOL(iwl_dump_nic_error_log);
#define EVENT_START_OFFSET (4 * sizeof(u32))
/**
* iwl_print_event_log - Dump error event log to syslog
*
*/
static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
u32 num_events, u32 mode)
{
u32 i;
u32 base; /* SRAM byte address of event log header */
u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
u32 ptr; /* SRAM byte address of log data */
u32 ev, time, data; /* event log data */
if (num_events == 0)
return;
if (priv->ucode_type == UCODE_INIT)
base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
else
base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
if (mode == 0)
event_size = 2 * sizeof(u32);
else
event_size = 3 * sizeof(u32);
ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
/* "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_read_targ_mem(priv, ptr);
ptr += sizeof(u32);
time = iwl_read_targ_mem(priv, ptr);
ptr += sizeof(u32);
if (mode == 0) {
/* data, ev */
IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
} else {
data = iwl_read_targ_mem(priv, ptr);
ptr += sizeof(u32);
IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
time, data, ev);
}
}
}
void iwl_dump_nic_event_log(struct iwl_priv *priv)
{
u32 base; /* SRAM byte address of event log header */
u32 capacity; /* event log capacity in # entries */
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 */
u32 size; /* # entries that we'll print */
if (priv->ucode_type == UCODE_INIT)
base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
else
base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
return;
}
/* event log header */
capacity = iwl_read_targ_mem(priv, base);
mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
size = num_wraps ? capacity : next_entry;
/* bail out if nothing in log */
if (size == 0) {
IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
return;
}
IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
size, num_wraps);
/* if uCode has wrapped back to top of log, start at the oldest entry,
* i.e the next one that uCode would fill. */
if (num_wraps)
iwl_print_event_log(priv, next_entry,
capacity - next_entry, mode);
/* (then/else) start at top of log */
iwl_print_event_log(priv, 0, next_entry, mode);
}
EXPORT_SYMBOL(iwl_dump_nic_event_log);
void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
struct iwl_ct_kill_config cmd;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&priv->lock, flags);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
spin_unlock_irqrestore(&priv->lock, flags);
cmd.critical_temperature_R =
cpu_to_le32(priv->hw_params.ct_kill_threshold);
ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
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",
cmd.critical_temperature_R);
}
EXPORT_SYMBOL(iwl_rf_kill_ct_config);
/*
* CARD_STATE_CMD
*
* Use: Sets the device's internal card state to enable, disable, or halt
*
* When in the 'enable' state the card operates as normal.
* When in the 'disable' state, the card enters into a low power mode.
* When in the 'halt' state, the card is shut down and must be fully
* restarted to come back on.
*/
int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
{
struct iwl_host_cmd cmd = {
.id = REPLY_CARD_STATE_CMD,
.len = sizeof(u32),
.data = &flags,
.meta.flags = meta_flag,
};
return iwl_send_cmd(priv, &cmd);
}
EXPORT_SYMBOL(iwl_send_card_state);
void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}
EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
"notification for %s:\n",
le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
}
EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
void iwl_rx_reply_error(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
"seq 0x%04X ser 0x%08X\n",
le32_to_cpu(pkt->u.err_resp.error_type),
get_cmd_string(pkt->u.err_resp.cmd_id),
pkt->u.err_resp.cmd_id,
le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
le32_to_cpu(pkt->u.err_resp.error_info));
}
EXPORT_SYMBOL(iwl_rx_reply_error);
void iwl_clear_isr_stats(struct iwl_priv *priv)
{
memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
}
EXPORT_SYMBOL(iwl_clear_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;
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);
priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
priv->qos_data.def_qos_parm.ac[q].edca_txop =
cpu_to_le16((params->txop * 32));
priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
priv->qos_data.qos_active = 1;
if (priv->iw_mode == NL80211_IFTYPE_AP)
iwl_activate_qos(priv, 1);
else if (priv->assoc_id && iwl_is_associated(priv))
iwl_activate_qos(priv, 0);
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
EXPORT_SYMBOL(iwl_mac_conf_tx);
static void iwl_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_sta_ht_cap *ht_conf;
struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
struct ieee80211_sta *sta;
IWL_DEBUG_MAC80211(priv, "enter: \n");
if (!iwl_conf->is_ht)
return;
/*
* It is totally wrong to base global information on something
* that is valid only when associated, alas, this driver works
* that way and I don't know how to fix it.
*/
rcu_read_lock();
sta = ieee80211_find_sta(priv->hw, priv->bssid);
if (!sta) {
rcu_read_unlock();
return;
}
ht_conf = &sta->ht_cap;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
iwl_conf->max_amsdu_size =
!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
iwl_conf->supported_chan_width =
!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
/*
* XXX: The HT configuration needs to be moved into iwl_mac_config()
* to be done there correctly.
*/
iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
if (conf_is_ht40_minus(&priv->hw->conf))
iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
else if (conf_is_ht40_plus(&priv->hw->conf))
iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
/* If no above or below channel supplied disable FAT channel */
if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
iwl_conf->supported_chan_width = 0;
iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
iwl_conf->ht_protection =
bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
iwl_conf->non_GF_STA_present =
!!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
rcu_read_unlock();
IWL_DEBUG_MAC80211(priv, "leave\n");
}
#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
void iwl_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changes)
{
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
if (!iwl_is_alive(priv))
return;
mutex_lock(&priv->mutex);
if (changes & BSS_CHANGED_BEACON &&
priv->iw_mode == NL80211_IFTYPE_AP) {
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
}
if (changes & BSS_CHANGED_BEACON_INT) {
priv->beacon_int = bss_conf->beacon_int;
/* TODO: in AP mode, do something to make this take effect */
}
if (changes & BSS_CHANGED_BSSID) {
IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
/*
* If there is currently a HW scan going on in the
* background then we need to cancel it else the RXON
* below/in post_associate will fail.
*/
if (iwl_scan_cancel_timeout(priv, 100)) {
IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
mutex_unlock(&priv->mutex);
return;
}
/* mac80211 only sets assoc when in STATION mode */
if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
bss_conf->assoc) {
memcpy(priv->staging_rxon.bssid_addr,
bss_conf->bssid, ETH_ALEN);
/* currently needed in a few places */
memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
} else {
priv->staging_rxon.filter_flags &=
~RXON_FILTER_ASSOC_MSK;
}
}
/*
* This needs to be after setting the BSSID in case
* mac80211 decides to do both changes at once because
* it will invoke post_associate.
*/
if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
changes & BSS_CHANGED_BEACON) {
struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
if (beacon)
iwl_mac_beacon_update(hw, beacon);
}
if (changes & BSS_CHANGED_ERP_PREAMBLE) {
IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
bss_conf->use_short_preamble);
if (bss_conf->use_short_preamble)
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
}
if (changes & BSS_CHANGED_ERP_CTS_PROT) {
IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
}
if (changes & BSS_CHANGED_BASIC_RATES) {
/* XXX use this information
*
* To do that, remove code from iwl_set_rate() and put something
* like this here:
*
if (A-band)
priv->staging_rxon.ofdm_basic_rates =
bss_conf->basic_rates;
else
priv->staging_rxon.ofdm_basic_rates =
bss_conf->basic_rates >> 4;
priv->staging_rxon.cck_basic_rates =
bss_conf->basic_rates & 0xF;
*/
}
if (changes & BSS_CHANGED_HT) {
iwl_ht_conf(priv, bss_conf);
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv);
}
if (changes & BSS_CHANGED_ASSOC) {
IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
if (bss_conf->assoc) {
priv->assoc_id = bss_conf->aid;
priv->beacon_int = bss_conf->beacon_int;
priv->power_data.dtim_period = bss_conf->dtim_period;
priv->timestamp = bss_conf->timestamp;
priv->assoc_capability = bss_conf->assoc_capability;
/*
* We have just associated, don't start scan too early
* leave time for EAPOL exchange to complete.
*
* XXX: do this in mac80211
*/
priv->next_scan_jiffies = jiffies +
IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
if (!iwl_is_rfkill(priv))
priv->cfg->ops->lib->post_associate(priv);
} else
priv->assoc_id = 0;
}
if (changes && iwl_is_associated(priv) && priv->assoc_id) {
IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
changes);
ret = iwl_send_rxon_assoc(priv);
if (!ret) {
/* Sync active_rxon with latest change. */
memcpy((void *)&priv->active_rxon,
&priv->staging_rxon,
sizeof(struct iwl_rxon_cmd));
}
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_bss_info_changed);
int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
__le64 timestamp;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
return -EIO;
}
if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
return -EIO;
}
spin_lock_irqsave(&priv->lock, flags);
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = skb;
priv->assoc_id = 0;
timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
priv->timestamp = le64_to_cpu(timestamp);
IWL_DEBUG_MAC80211(priv, "leave\n");
spin_unlock_irqrestore(&priv->lock, flags);
iwl_reset_qos(priv);
priv->cfg->ops->lib->post_associate(priv);
return 0;
}
EXPORT_SYMBOL(iwl_mac_beacon_update);
int iwl_set_mode(struct iwl_priv *priv, int mode)
{
if (mode == NL80211_IFTYPE_ADHOC) {
const struct iwl_channel_info *ch_info;
ch_info = iwl_get_channel_info(priv,
priv->band,
le16_to_cpu(priv->staging_rxon.channel));
if (!ch_info || !is_channel_ibss(ch_info)) {
IWL_ERR(priv, "channel %d not IBSS channel\n",
le16_to_cpu(priv->staging_rxon.channel));
return -EINVAL;
}
}
iwl_connection_init_rx_config(priv, mode);
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
iwl_clear_stations_table(priv);
/* dont commit rxon if rf-kill is on*/
if (!iwl_is_ready_rf(priv))
return -EAGAIN;
iwlcore_commit_rxon(priv);
return 0;
}
EXPORT_SYMBOL(iwl_set_mode);
int iwl_mac_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
if (priv->vif) {
IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
return -EOPNOTSUPP;
}
spin_lock_irqsave(&priv->lock, flags);
priv->vif = conf->vif;
priv->iw_mode = conf->type;
spin_unlock_irqrestore(&priv->lock, flags);
mutex_lock(&priv->mutex);
if (conf->mac_addr) {
IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
}
if (iwl_set_mode(priv, conf->type) == -EAGAIN)
/* we are not ready, will run again when ready */
set_bit(STATUS_MODE_PENDING, &priv->status);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
EXPORT_SYMBOL(iwl_mac_add_interface);
void iwl_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
if (iwl_is_ready_rf(priv)) {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwlcore_commit_rxon(priv);
}
if (priv->vif == conf->vif) {
priv->vif = NULL;
memset(priv->bssid, 0, ETH_ALEN);
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_mac_remove_interface);
/**
* iwl_mac_config - mac80211 config callback
*
* We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
* be set inappropriately and the driver currently sets the hardware up to
* use it whenever needed.
*/
int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
{
struct iwl_priv *priv = hw->priv;
const struct iwl_channel_info *ch_info;
struct ieee80211_conf *conf = &hw->conf;
unsigned long flags = 0;
int ret = 0;
u16 ch;
int scan_active = 0;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
conf->channel->hw_value, changed);
if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
test_bit(STATUS_SCANNING, &priv->status))) {
scan_active = 1;
IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
}
/* during scanning mac80211 will delay channel setting until
* scan finish with changed = 0
*/
if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
if (scan_active)
goto set_ch_out;
ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
ret = -EINVAL;
goto set_ch_out;
}
if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
!is_channel_ibss(ch_info)) {
IWL_ERR(priv, "channel %d in band %d not "
"IBSS channel\n",
conf->channel->hw_value, conf->channel->band);
ret = -EINVAL;
goto set_ch_out;
}
priv->current_ht_config.is_ht = conf_is_ht(conf);
spin_lock_irqsave(&priv->lock, flags);
/* if we are switching from ht to 2.4 clear flags
* from any ht related info since 2.4 does not
* support ht */
if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
priv->staging_rxon.flags = 0;
iwl_set_rxon_channel(priv, conf->channel);
iwl_set_flags_for_band(priv, conf->channel->band);
spin_unlock_irqrestore(&priv->lock, flags);
set_ch_out:
/* The list of supported rates and rate mask can be different
* for each band; since the band may have changed, reset
* the rate mask to what mac80211 lists */
iwl_set_rate(priv);
}
if (changed & IEEE80211_CONF_CHANGE_PS &&
priv->iw_mode == NL80211_IFTYPE_STATION) {
priv->power_data.power_disabled =
!(conf->flags & IEEE80211_CONF_PS);
ret = iwl_power_update_mode(priv, 0);
if (ret)
IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
}
if (changed & IEEE80211_CONF_CHANGE_POWER) {
IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
priv->tx_power_user_lmt, conf->power_level);
iwl_set_tx_power(priv, conf->power_level, false);
}
/* call to ensure that 4965 rx_chain is set properly in monitor mode */
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv);
if (!iwl_is_ready(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
goto out;
}
if (scan_active)
goto out;
if (memcmp(&priv->active_rxon,
&priv->staging_rxon, sizeof(priv->staging_rxon)))
iwlcore_commit_rxon(priv);
else
IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
out:
IWL_DEBUG_MAC80211(priv, "leave\n");
mutex_unlock(&priv->mutex);
return ret;
}
EXPORT_SYMBOL(iwl_mac_config);
int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
struct ieee80211_tx_queue_stats *stats)
{
struct iwl_priv *priv = hw->priv;
int i, avail;
struct iwl_tx_queue *txq;
struct iwl_queue *q;
unsigned long flags;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
return -EIO;
}
spin_lock_irqsave(&priv->lock, flags);
for (i = 0; i < AC_NUM; i++) {
txq = &priv->txq[i];
q = &txq->q;
avail = iwl_queue_space(q);
stats[i].len = q->n_window - avail;
stats[i].limit = q->n_window - q->high_mark;
stats[i].count = q->n_window;
}
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
EXPORT_SYMBOL(iwl_mac_get_tx_stats);
void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "enter\n");
spin_lock_irqsave(&priv->lock, flags);
memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
spin_unlock_irqrestore(&priv->lock, flags);
iwl_reset_qos(priv);
spin_lock_irqsave(&priv->lock, flags);
priv->assoc_id = 0;
priv->assoc_capability = 0;
priv->assoc_station_added = 0;
/* new association get rid of ibss beacon skb */
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = NULL;
priv->beacon_int = priv->vif->bss_conf.beacon_int;
priv->timestamp = 0;
if ((priv->iw_mode == NL80211_IFTYPE_STATION))
priv->beacon_int = 0;
spin_unlock_irqrestore(&priv->lock, flags);
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
mutex_unlock(&priv->mutex);
return;
}
/* we are restarting association process
* clear RXON_FILTER_ASSOC_MSK bit
*/
if (priv->iw_mode != NL80211_IFTYPE_AP) {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwlcore_commit_rxon(priv);
}
if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
mutex_unlock(&priv->mutex);
return;
}
iwl_set_rate(priv);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_mac_reset_tsf);
#ifdef CONFIG_PM
int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
/*
* 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.
*/
priv->cfg->ops->lib->apm_ops.stop(priv);
pci_save_state(pdev);
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
EXPORT_SYMBOL(iwl_pci_suspend);
int iwl_pci_resume(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
int ret;
pci_set_power_state(pdev, PCI_D0);
ret = pci_enable_device(pdev);
if (ret)
return ret;
pci_restore_state(pdev);
iwl_enable_interrupts(priv);
return 0;
}
EXPORT_SYMBOL(iwl_pci_resume);
#endif /* CONFIG_PM */
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