/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2010 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 <net/mac80211.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-helpers.h"
#include "iwl-legacy.h"
static void iwl_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!ctx->is_active)
return;
ctx->qos_data.def_qos_parm.qos_flags = 0;
if (ctx->qos_data.qos_active)
ctx->qos_data.def_qos_parm.qos_flags |=
QOS_PARAM_FLG_UPDATE_EDCA_MSK;
if (ctx->ht.enabled)
ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
ctx->qos_data.qos_active,
ctx->qos_data.def_qos_parm.qos_flags);
iwl_send_cmd_pdu_async(priv, ctx->qos_cmd,
sizeof(struct iwl_qosparam_cmd),
&ctx->qos_data.def_qos_parm, NULL);
}
/**
* iwl_legacy_mac_config - mac80211 config callback
*/
int iwl_legacy_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;
struct ieee80211_channel *channel = conf->channel;
struct iwl_ht_config *ht_conf = &priv->current_ht_config;
struct iwl_rxon_context *ctx;
unsigned long flags = 0;
int ret = 0;
u16 ch;
int scan_active = 0;
bool ht_changed[NUM_IWL_RXON_CTX] = {};
if (WARN_ON(!priv->cfg->ops->legacy))
return -EOPNOTSUPP;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
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");
}
if (changed & (IEEE80211_CONF_CHANGE_SMPS |
IEEE80211_CONF_CHANGE_CHANNEL)) {
/* mac80211 uses static for non-HT which is what we want */
priv->current_ht_config.smps = conf->smps_mode;
/*
* Recalculate chain counts.
*
* If monitor mode is enabled then mac80211 will
* set up the SM PS mode to OFF if an HT channel is
* configured.
*/
if (priv->cfg->ops->hcmd->set_rxon_chain)
for_each_context(priv, ctx)
priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
}
/* 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 = channel->hw_value;
ch_info = iwl_get_channel_info(priv, channel->band, ch);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
ret = -EINVAL;
goto set_ch_out;
}
spin_lock_irqsave(&priv->lock, flags);
for_each_context(priv, ctx) {
/* Configure HT40 channels */
if (ctx->ht.enabled != conf_is_ht(conf)) {
ctx->ht.enabled = conf_is_ht(conf);
ht_changed[ctx->ctxid] = true;
}
if (ctx->ht.enabled) {
if (conf_is_ht40_minus(conf)) {
ctx->ht.extension_chan_offset =
IEEE80211_HT_PARAM_CHA_SEC_BELOW;
ctx->ht.is_40mhz = true;
} else if (conf_is_ht40_plus(conf)) {
ctx->ht.extension_chan_offset =
IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
ctx->ht.is_40mhz = true;
} else {
ctx->ht.extension_chan_offset =
IEEE80211_HT_PARAM_CHA_SEC_NONE;
ctx->ht.is_40mhz = false;
}
} else
ctx->ht.is_40mhz = false;
/*
* Default to no protection. Protection mode will
* later be set from BSS config in iwl_ht_conf
*/
ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
/* 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(ctx->staging.channel) != ch))
ctx->staging.flags = 0;
iwl_set_rxon_channel(priv, channel, ctx);
iwl_set_rxon_ht(priv, ht_conf);
iwl_set_flags_for_band(priv, ctx, channel->band,
ctx->vif);
}
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->cfg->ops->legacy->update_bcast_stations)
ret = priv->cfg->ops->legacy->update_bcast_stations(priv);
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 |
IEEE80211_CONF_CHANGE_IDLE)) {
ret = iwl_power_update_mode(priv, false);
if (ret)
IWL_DEBUG_MAC80211(priv, "Error setting sleep 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);
}
if (!iwl_is_ready(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
goto out;
}
if (scan_active)
goto out;
for_each_context(priv, ctx) {
if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
iwlcore_commit_rxon(priv, ctx);
else
IWL_DEBUG_INFO(priv,
"Not re-sending same RXON configuration.\n");
if (ht_changed[ctx->ctxid])
iwl_update_qos(priv, ctx);
}
out:
IWL_DEBUG_MAC80211(priv, "leave\n");
mutex_unlock(&priv->mutex);
return ret;
}
EXPORT_SYMBOL(iwl_legacy_mac_config);
void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
/* IBSS can only be the IWL_RXON_CTX_BSS context */
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
if (WARN_ON(!priv->cfg->ops->legacy))
return;
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_config));
spin_unlock_irqrestore(&priv->lock, flags);
spin_lock_irqsave(&priv->lock, flags);
/* new association get rid of ibss beacon skb */
if (priv->beacon_skb)
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = NULL;
priv->timestamp = 0;
spin_unlock_irqrestore(&priv->lock, flags);
iwl_scan_cancel_timeout(priv, 100);
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
*/
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwlcore_commit_rxon(priv, ctx);
iwl_set_rate(priv);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
static void iwl_ht_conf(struct iwl_priv *priv,
struct ieee80211_vif *vif)
{
struct iwl_ht_config *ht_conf = &priv->current_ht_config;
struct ieee80211_sta *sta;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
IWL_DEBUG_ASSOC(priv, "enter:\n");
if (!ctx->ht.enabled)
return;
ctx->ht.protection =
bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
ctx->ht.non_gf_sta_present =
!!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
ht_conf->single_chain_sufficient = false;
switch (vif->type) {
case NL80211_IFTYPE_STATION:
rcu_read_lock();
sta = ieee80211_find_sta(vif, bss_conf->bssid);
if (sta) {
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
int maxstreams;
maxstreams = (ht_cap->mcs.tx_params &
IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
>> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
maxstreams += 1;
if ((ht_cap->mcs.rx_mask[1] == 0) &&
(ht_cap->mcs.rx_mask[2] == 0))
ht_conf->single_chain_sufficient = true;
if (maxstreams <= 1)
ht_conf->single_chain_sufficient = true;
} else {
/*
* If at all, this can only happen through a race
* when the AP disconnects us while we're still
* setting up the connection, in that case mac80211
* will soon tell us about that.
*/
ht_conf->single_chain_sufficient = true;
}
rcu_read_unlock();
break;
case NL80211_IFTYPE_ADHOC:
ht_conf->single_chain_sufficient = true;
break;
default:
break;
}
IWL_DEBUG_ASSOC(priv, "leave\n");
}
static inline void iwl_set_no_assoc(struct iwl_priv *priv,
struct ieee80211_vif *vif)
{
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
iwl_led_disassociate(priv);
/*
* inform the ucode that there is no longer an
* association and that no more packets should be
* sent
*/
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
ctx->staging.assoc_id = 0;
iwlcore_commit_rxon(priv, ctx);
}
static void iwlcore_beacon_update(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
__le64 timestamp;
struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
if (!skb)
return;
IWL_DEBUG_MAC80211(priv, "enter\n");
lockdep_assert_held(&priv->mutex);
if (!priv->beacon_ctx) {
IWL_ERR(priv, "update beacon but no beacon context!\n");
dev_kfree_skb(skb);
return;
}
spin_lock_irqsave(&priv->lock, flags);
if (priv->beacon_skb)
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = skb;
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);
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
return;
}
priv->cfg->ops->legacy->post_associate(priv);
}
void iwl_legacy_mac_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;
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
int ret;
if (WARN_ON(!priv->cfg->ops->legacy))
return;
IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
if (!iwl_is_alive(priv))
return;
mutex_lock(&priv->mutex);
if (changes & BSS_CHANGED_QOS) {
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
ctx->qos_data.qos_active = bss_conf->qos;
iwl_update_qos(priv, ctx);
spin_unlock_irqrestore(&priv->lock, flags);
}
if (changes & BSS_CHANGED_BEACON_ENABLED) {
/*
* the add_interface code must make sure we only ever
* have a single interface that could be beaconing at
* any time.
*/
if (vif->bss_conf.enable_beacon)
priv->beacon_ctx = ctx;
else
priv->beacon_ctx = NULL;
}
if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = ieee80211_beacon_get(hw, vif);
}
if (changes & BSS_CHANGED_BEACON_INT && vif->type == NL80211_IFTYPE_AP)
iwl_send_rxon_timing(priv, ctx);
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 (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
memcpy(ctx->staging.bssid_addr,
bss_conf->bssid, ETH_ALEN);
/* currently needed in a few places */
memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
} else {
ctx->staging.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 (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
iwlcore_beacon_update(hw, vif);
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)
ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
ctx->staging.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))
ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
else
ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
if (bss_conf->use_cts_prot)
ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
else
ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
}
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)
ctx->staging.ofdm_basic_rates =
bss_conf->basic_rates;
else
ctx->staging.ofdm_basic_rates =
bss_conf->basic_rates >> 4;
ctx->staging.cck_basic_rates =
bss_conf->basic_rates & 0xF;
*/
}
if (changes & BSS_CHANGED_HT) {
iwl_ht_conf(priv, vif);
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
}
if (changes & BSS_CHANGED_ASSOC) {
IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
if (bss_conf->assoc) {
priv->timestamp = bss_conf->timestamp;
iwl_led_associate(priv);
if (!iwl_is_rfkill(priv))
priv->cfg->ops->legacy->post_associate(priv);
} else
iwl_set_no_assoc(priv, vif);
}
if (changes && iwl_is_associated_ctx(ctx) && bss_conf->aid) {
IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
changes);
ret = iwl_send_rxon_assoc(priv, ctx);
if (!ret) {
/* Sync active_rxon with latest change. */
memcpy((void *)&ctx->active,
&ctx->staging,
sizeof(struct iwl_rxon_cmd));
}
}
if (changes & BSS_CHANGED_BEACON_ENABLED) {
if (vif->bss_conf.enable_beacon) {
memcpy(ctx->staging.bssid_addr,
bss_conf->bssid, ETH_ALEN);
memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
iwl_led_associate(priv);
priv->cfg->ops->legacy->config_ap(priv);
} else
iwl_set_no_assoc(priv, vif);
}
if (changes & BSS_CHANGED_IBSS) {
ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
bss_conf->ibss_joined);
if (ret)
IWL_ERR(priv, "failed to %s IBSS station %pM\n",
bss_conf->ibss_joined ? "add" : "remove",
bss_conf->bssid);
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
irqreturn_t iwl_isr_legacy(int irq, void *data)
{
struct iwl_priv *priv = data;
u32 inta, inta_mask;
u32 inta_fh;
unsigned long flags;
if (!priv)
return IRQ_NONE;
spin_lock_irqsave(&priv->lock, flags);
/* 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_irqrestore(&priv->lock, flags);
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_irqrestore(&priv->lock, flags);
return IRQ_NONE;
}
EXPORT_SYMBOL(iwl_isr_legacy);
/*
* iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
* function.
*/
void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
struct ieee80211_tx_info *info,
__le16 fc, __le32 *tx_flags)
{
if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
*tx_flags |= TX_CMD_FLG_RTS_MSK;
*tx_flags &= ~TX_CMD_FLG_CTS_MSK;
*tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
if (!ieee80211_is_mgmt(fc))
return;
switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
case cpu_to_le16(IEEE80211_STYPE_AUTH):
case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
*tx_flags &= ~TX_CMD_FLG_RTS_MSK;
*tx_flags |= TX_CMD_FLG_CTS_MSK;
break;
}
} else if (info->control.rates[0].flags &
IEEE80211_TX_RC_USE_CTS_PROTECT) {
*tx_flags &= ~TX_CMD_FLG_RTS_MSK;
*tx_flags |= TX_CMD_FLG_CTS_MSK;
*tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
}
}
EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);
