linux/drivers/net/wireless/iwlwifi/dvm/rxon.c
Johannes Berg 26a7ca9a71 iwlwifi: refactor EEPROM reading/parsing
The EEPROM reading/parsing code is all mixed in
the driver today, and the EEPROM is parsed only
when we access data from it. This is problematic
because the NVM needs to be parsed and that is
independent of reading it. Also, the NVM format
for new devices will be different and probably
require a new parser.

Therefore refactor the reading and parsing and
create two independent components. Reading the
EEPROM requires direct hardware accesses and
therefore access to the transport, but parsing
is independent and can be done on an NVM blob.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-06-06 13:24:19 +02:00

1578 lines
45 KiB
C

/******************************************************************************
*
* Copyright(c) 2003 - 2012 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.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/etherdevice.h>
#include "iwl-trans.h"
#include "iwl-modparams.h"
#include "dev.h"
#include "agn.h"
#include "calib.h"
/*
* initialize rxon structure with default values from eeprom
*/
void iwl_connection_init_rx_config(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
memset(&ctx->staging, 0, sizeof(ctx->staging));
if (!ctx->vif) {
ctx->staging.dev_type = ctx->unused_devtype;
} else
switch (ctx->vif->type) {
case NL80211_IFTYPE_AP:
ctx->staging.dev_type = ctx->ap_devtype;
break;
case NL80211_IFTYPE_STATION:
ctx->staging.dev_type = ctx->station_devtype;
ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
break;
case NL80211_IFTYPE_ADHOC:
ctx->staging.dev_type = ctx->ibss_devtype;
ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
RXON_FILTER_ACCEPT_GRP_MSK;
break;
case NL80211_IFTYPE_MONITOR:
ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
break;
default:
IWL_ERR(priv, "Unsupported interface type %d\n",
ctx->vif->type);
break;
}
#if 0
/* TODO: Figure out when short_preamble would be set and cache from
* that */
if (!hw_to_local(priv->hw)->short_preamble)
ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
else
ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif
ctx->staging.channel = cpu_to_le16(priv->hw->conf.channel->hw_value);
priv->band = priv->hw->conf.channel->band;
iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
/* clear both MIX and PURE40 mode flag */
ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
RXON_FLG_CHANNEL_MODE_PURE_40);
if (ctx->vif)
memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
}
static int iwlagn_disable_bss(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct iwl_rxon_cmd *send)
{
__le32 old_filter = send->filter_flags;
int ret;
send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
CMD_SYNC, sizeof(*send), send);
send->filter_flags = old_filter;
if (ret)
IWL_DEBUG_QUIET_RFKILL(priv,
"Error clearing ASSOC_MSK on BSS (%d)\n", ret);
return ret;
}
static int iwlagn_disable_pan(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct iwl_rxon_cmd *send)
{
struct iwl_notification_wait disable_wait;
__le32 old_filter = send->filter_flags;
u8 old_dev_type = send->dev_type;
int ret;
static const u8 deactivate_cmd[] = {
REPLY_WIPAN_DEACTIVATION_COMPLETE
};
iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
NULL, NULL);
send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
send->dev_type = RXON_DEV_TYPE_P2P;
ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
CMD_SYNC, sizeof(*send), send);
send->filter_flags = old_filter;
send->dev_type = old_dev_type;
if (ret) {
IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
iwl_remove_notification(&priv->notif_wait, &disable_wait);
} else {
ret = iwl_wait_notification(&priv->notif_wait,
&disable_wait, HZ);
if (ret)
IWL_ERR(priv, "Timed out waiting for PAN disable\n");
}
return ret;
}
static int iwlagn_disconn_pan(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct iwl_rxon_cmd *send)
{
__le32 old_filter = send->filter_flags;
int ret;
send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
sizeof(*send), send);
send->filter_flags = old_filter;
return ret;
}
static void iwlagn_update_qos(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int ret;
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_INFO(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);
ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
sizeof(struct iwl_qosparam_cmd),
&ctx->qos_data.def_qos_parm);
if (ret)
IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
}
static int iwlagn_update_beacon(struct iwl_priv *priv,
struct ieee80211_vif *vif)
{
lockdep_assert_held(&priv->mutex);
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
if (!priv->beacon_skb)
return -ENOMEM;
return iwlagn_send_beacon_cmd(priv);
}
static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int ret = 0;
struct iwl_rxon_assoc_cmd rxon_assoc;
const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
const struct iwl_rxon_cmd *rxon2 = &ctx->active;
if ((rxon1->flags == rxon2->flags) &&
(rxon1->filter_flags == rxon2->filter_flags) &&
(rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
(rxon1->ofdm_ht_single_stream_basic_rates ==
rxon2->ofdm_ht_single_stream_basic_rates) &&
(rxon1->ofdm_ht_dual_stream_basic_rates ==
rxon2->ofdm_ht_dual_stream_basic_rates) &&
(rxon1->ofdm_ht_triple_stream_basic_rates ==
rxon2->ofdm_ht_triple_stream_basic_rates) &&
(rxon1->acquisition_data == rxon2->acquisition_data) &&
(rxon1->rx_chain == rxon2->rx_chain) &&
(rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
return 0;
}
rxon_assoc.flags = ctx->staging.flags;
rxon_assoc.filter_flags = ctx->staging.filter_flags;
rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
rxon_assoc.reserved1 = 0;
rxon_assoc.reserved2 = 0;
rxon_assoc.reserved3 = 0;
rxon_assoc.ofdm_ht_single_stream_basic_rates =
ctx->staging.ofdm_ht_single_stream_basic_rates;
rxon_assoc.ofdm_ht_dual_stream_basic_rates =
ctx->staging.ofdm_ht_dual_stream_basic_rates;
rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
rxon_assoc.ofdm_ht_triple_stream_basic_rates =
ctx->staging.ofdm_ht_triple_stream_basic_rates;
rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
return ret;
}
static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
{
u16 new_val;
u16 beacon_factor;
/*
* If mac80211 hasn't given us a beacon interval, program
* the default into the device (not checking this here
* would cause the adjustment below to return the maximum
* value, which may break PAN.)
*/
if (!beacon_val)
return DEFAULT_BEACON_INTERVAL;
/*
* If the beacon interval we obtained from the peer
* is too large, we'll have to wake up more often
* (and in IBSS case, we'll beacon too much)
*
* For example, if max_beacon_val is 4096, and the
* requested beacon interval is 7000, we'll have to
* use 3500 to be able to wake up on the beacons.
*
* This could badly influence beacon detection stats.
*/
beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
new_val = beacon_val / beacon_factor;
if (!new_val)
new_val = max_beacon_val;
return new_val;
}
static int iwl_send_rxon_timing(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
u64 tsf;
s32 interval_tm, rem;
struct ieee80211_conf *conf = NULL;
u16 beacon_int;
struct ieee80211_vif *vif = ctx->vif;
conf = &priv->hw->conf;
lockdep_assert_held(&priv->mutex);
memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
beacon_int = vif ? vif->bss_conf.beacon_int : 0;
/*
* TODO: For IBSS we need to get atim_window from mac80211,
* for now just always use 0
*/
ctx->timing.atim_window = 0;
if (ctx->ctxid == IWL_RXON_CTX_PAN &&
(!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
priv->contexts[IWL_RXON_CTX_BSS].vif &&
priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
ctx->timing.beacon_interval =
priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
} else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
priv->contexts[IWL_RXON_CTX_PAN].vif &&
priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
(!iwl_is_associated_ctx(ctx) || !ctx->vif ||
!ctx->vif->bss_conf.beacon_int)) {
ctx->timing.beacon_interval =
priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
} else {
beacon_int = iwl_adjust_beacon_interval(beacon_int,
IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
}
ctx->beacon_int = beacon_int;
tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
interval_tm = beacon_int * TIME_UNIT;
rem = do_div(tsf, interval_tm);
ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
IWL_DEBUG_ASSOC(priv,
"beacon interval %d beacon timer %d beacon tim %d\n",
le16_to_cpu(ctx->timing.beacon_interval),
le32_to_cpu(ctx->timing.beacon_init_val),
le16_to_cpu(ctx->timing.atim_window));
return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
}
static int iwlagn_rxon_disconn(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int ret;
struct iwl_rxon_cmd *active = (void *)&ctx->active;
if (ctx->ctxid == IWL_RXON_CTX_BSS) {
ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
} else {
ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
if (ret)
return ret;
if (ctx->vif) {
ret = iwl_send_rxon_timing(priv, ctx);
if (ret) {
IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
return ret;
}
ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
}
}
if (ret)
return ret;
/*
* Un-assoc RXON clears the station table and WEP
* keys, so we have to restore those afterwards.
*/
iwl_clear_ucode_stations(priv, ctx);
/* update -- might need P2P now */
iwl_update_bcast_station(priv, ctx);
iwl_restore_stations(priv, ctx);
ret = iwl_restore_default_wep_keys(priv, ctx);
if (ret) {
IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
return ret;
}
memcpy(active, &ctx->staging, sizeof(*active));
return 0;
}
static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
int ret;
s8 prev_tx_power;
bool defer;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
return 0;
lockdep_assert_held(&priv->mutex);
if (priv->tx_power_user_lmt == tx_power && !force)
return 0;
if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
IWL_WARN(priv,
"Requested user TXPOWER %d below lower limit %d.\n",
tx_power,
IWLAGN_TX_POWER_TARGET_POWER_MIN);
return -EINVAL;
}
if (tx_power > DIV_ROUND_UP(priv->eeprom_data->max_tx_pwr_half_dbm, 2)) {
IWL_WARN(priv,
"Requested user TXPOWER %d above upper limit %d.\n",
tx_power, priv->eeprom_data->max_tx_pwr_half_dbm);
return -EINVAL;
}
if (!iwl_is_ready_rf(priv))
return -EIO;
/* scan complete and commit_rxon use tx_power_next value,
* it always need to be updated for newest request */
priv->tx_power_next = tx_power;
/* do not set tx power when scanning or channel changing */
defer = test_bit(STATUS_SCANNING, &priv->status) ||
memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
if (defer && !force) {
IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
return 0;
}
prev_tx_power = priv->tx_power_user_lmt;
priv->tx_power_user_lmt = tx_power;
ret = iwlagn_send_tx_power(priv);
/* if fail to set tx_power, restore the orig. tx power */
if (ret) {
priv->tx_power_user_lmt = prev_tx_power;
priv->tx_power_next = prev_tx_power;
}
return ret;
}
static int iwlagn_rxon_connect(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int ret;
struct iwl_rxon_cmd *active = (void *)&ctx->active;
/* RXON timing must be before associated RXON */
if (ctx->ctxid == IWL_RXON_CTX_BSS) {
ret = iwl_send_rxon_timing(priv, ctx);
if (ret) {
IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
return ret;
}
}
/* QoS info may be cleared by previous un-assoc RXON */
iwlagn_update_qos(priv, ctx);
/*
* We'll run into this code path when beaconing is
* enabled, but then we also need to send the beacon
* to the device.
*/
if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
ret = iwlagn_update_beacon(priv, ctx->vif);
if (ret) {
IWL_ERR(priv,
"Error sending required beacon (%d)!\n",
ret);
return ret;
}
}
priv->start_calib = 0;
/*
* Apply the new configuration.
*
* Associated RXON doesn't clear the station table in uCode,
* so we don't need to restore stations etc. after this.
*/
ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
sizeof(struct iwl_rxon_cmd), &ctx->staging);
if (ret) {
IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
return ret;
}
memcpy(active, &ctx->staging, sizeof(*active));
/* IBSS beacon needs to be sent after setting assoc */
if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
if (iwlagn_update_beacon(priv, ctx->vif))
IWL_ERR(priv, "Error sending IBSS beacon\n");
iwl_init_sensitivity(priv);
/*
* If we issue a new RXON command which required a tune then
* we must send a new TXPOWER command or we won't be able to
* Tx any frames.
*
* It's expected we set power here if channel is changing.
*/
ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
if (ret) {
IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
return ret;
}
if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
ieee80211_request_smps(ctx->vif,
priv->cfg->ht_params->smps_mode);
return 0;
}
int iwlagn_set_pan_params(struct iwl_priv *priv)
{
struct iwl_wipan_params_cmd cmd;
struct iwl_rxon_context *ctx_bss, *ctx_pan;
int slot0 = 300, slot1 = 0;
int ret;
if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
return 0;
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
lockdep_assert_held(&priv->mutex);
ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
/*
* If the PAN context is inactive, then we don't need
* to update the PAN parameters, the last thing we'll
* have done before it goes inactive is making the PAN
* parameters be WLAN-only.
*/
if (!ctx_pan->is_active)
return 0;
memset(&cmd, 0, sizeof(cmd));
/* only 2 slots are currently allowed */
cmd.num_slots = 2;
cmd.slots[0].type = 0; /* BSS */
cmd.slots[1].type = 1; /* PAN */
if (priv->hw_roc_setup) {
/* both contexts must be used for this to happen */
slot1 = IWL_MIN_SLOT_TIME;
slot0 = 3000;
} else if (ctx_bss->vif && ctx_pan->vif) {
int bcnint = ctx_pan->beacon_int;
int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
/* should be set, but seems unused?? */
cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
bcnint &&
bcnint != ctx_bss->beacon_int) {
IWL_ERR(priv,
"beacon intervals don't match (%d, %d)\n",
ctx_bss->beacon_int, ctx_pan->beacon_int);
} else
bcnint = max_t(int, bcnint,
ctx_bss->beacon_int);
if (!bcnint)
bcnint = DEFAULT_BEACON_INTERVAL;
slot0 = bcnint / 2;
slot1 = bcnint - slot0;
if (test_bit(STATUS_SCAN_HW, &priv->status) ||
(!ctx_bss->vif->bss_conf.idle &&
!ctx_bss->vif->bss_conf.assoc)) {
slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
slot1 = IWL_MIN_SLOT_TIME;
} else if (!ctx_pan->vif->bss_conf.idle &&
!ctx_pan->vif->bss_conf.assoc) {
slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
slot0 = IWL_MIN_SLOT_TIME;
}
} else if (ctx_pan->vif) {
slot0 = 0;
slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
ctx_pan->beacon_int;
slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
if (test_bit(STATUS_SCAN_HW, &priv->status)) {
slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
slot1 = IWL_MIN_SLOT_TIME;
}
}
cmd.slots[0].width = cpu_to_le16(slot0);
cmd.slots[1].width = cpu_to_le16(slot1);
ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
sizeof(cmd), &cmd);
if (ret)
IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
return ret;
}
static void _iwl_set_rxon_ht(struct iwl_priv *priv,
struct iwl_ht_config *ht_conf,
struct iwl_rxon_context *ctx)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
if (!ctx->ht.enabled) {
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
RXON_FLG_HT40_PROT_MSK |
RXON_FLG_HT_PROT_MSK);
return;
}
/* FIXME: if the definition of ht.protection changed, the "translation"
* will be needed for rxon->flags
*/
rxon->flags |= cpu_to_le32(ctx->ht.protection <<
RXON_FLG_HT_OPERATING_MODE_POS);
/* Set up channel bandwidth:
* 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
/* clear the HT channel mode before set the mode */
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
/* pure ht40 */
if (ctx->ht.protection ==
IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
/*
* Note: control channel is opposite of extension
* channel
*/
switch (ctx->ht.extension_chan_offset) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
rxon->flags &=
~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
rxon->flags |=
RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
break;
}
} else {
/*
* Note: control channel is opposite of extension
* channel
*/
switch (ctx->ht.extension_chan_offset) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
rxon->flags &=
~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
break;
case IEEE80211_HT_PARAM_CHA_SEC_NONE:
default:
/*
* channel location only valid if in Mixed
* mode
*/
IWL_ERR(priv,
"invalid extension channel offset\n");
break;
}
}
} else {
rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
}
iwlagn_set_rxon_chain(priv, ctx);
IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
"extension channel offset 0x%x\n",
le32_to_cpu(rxon->flags), ctx->ht.protection,
ctx->ht.extension_chan_offset);
}
void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
{
struct iwl_rxon_context *ctx;
for_each_context(priv, ctx)
_iwl_set_rxon_ht(priv, ht_conf, ctx);
}
/**
* iwl_set_rxon_channel - Set the band and channel values in staging RXON
* @ch: requested channel as a pointer to struct ieee80211_channel
* NOTE: Does not commit to the hardware; it sets appropriate bit fields
* in the staging RXON flag structure based on the ch->band
*/
void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
struct iwl_rxon_context *ctx)
{
enum ieee80211_band band = ch->band;
u16 channel = ch->hw_value;
if ((le16_to_cpu(ctx->staging.channel) == channel) &&
(priv->band == band))
return;
ctx->staging.channel = cpu_to_le16(channel);
if (band == IEEE80211_BAND_5GHZ)
ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
else
ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
priv->band = band;
IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
}
void iwl_set_flags_for_band(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
enum ieee80211_band band,
struct ieee80211_vif *vif)
{
if (band == IEEE80211_BAND_5GHZ) {
ctx->staging.flags &=
~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
| RXON_FLG_CCK_MSK);
ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
} else {
/* Copied from iwl_post_associate() */
if (vif && vif->bss_conf.use_short_slot)
ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
}
}
static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
struct iwl_rxon_context *ctx, int hw_decrypt)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
if (hw_decrypt)
rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
else
rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
}
/* validate RXON structure is valid */
static int iwl_check_rxon_cmd(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct iwl_rxon_cmd *rxon = &ctx->staging;
u32 errors = 0;
if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
IWL_WARN(priv, "check 2.4G: wrong narrow\n");
errors |= BIT(0);
}
if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
IWL_WARN(priv, "check 2.4G: wrong radar\n");
errors |= BIT(1);
}
} else {
if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
IWL_WARN(priv, "check 5.2G: not short slot!\n");
errors |= BIT(2);
}
if (rxon->flags & RXON_FLG_CCK_MSK) {
IWL_WARN(priv, "check 5.2G: CCK!\n");
errors |= BIT(3);
}
}
if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
IWL_WARN(priv, "mac/bssid mcast!\n");
errors |= BIT(4);
}
/* make sure basic rates 6Mbps and 1Mbps are supported */
if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
(rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
IWL_WARN(priv, "neither 1 nor 6 are basic\n");
errors |= BIT(5);
}
if (le16_to_cpu(rxon->assoc_id) > 2007) {
IWL_WARN(priv, "aid > 2007\n");
errors |= BIT(6);
}
if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
IWL_WARN(priv, "CCK and short slot\n");
errors |= BIT(7);
}
if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
IWL_WARN(priv, "CCK and auto detect");
errors |= BIT(8);
}
if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
RXON_FLG_TGG_PROTECT_MSK)) ==
RXON_FLG_TGG_PROTECT_MSK) {
IWL_WARN(priv, "TGg but no auto-detect\n");
errors |= BIT(9);
}
if (rxon->channel == 0) {
IWL_WARN(priv, "zero channel is invalid\n");
errors |= BIT(10);
}
WARN(errors, "Invalid RXON (%#x), channel %d",
errors, le16_to_cpu(rxon->channel));
return errors ? -EINVAL : 0;
}
/**
* iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
* @priv: staging_rxon is compared to active_rxon
*
* If the RXON structure is changing enough to require a new tune,
* or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
* a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
*/
static int iwl_full_rxon_required(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
const struct iwl_rxon_cmd *staging = &ctx->staging;
const struct iwl_rxon_cmd *active = &ctx->active;
#define CHK(cond) \
if ((cond)) { \
IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
return 1; \
}
#define CHK_NEQ(c1, c2) \
if ((c1) != (c2)) { \
IWL_DEBUG_INFO(priv, "need full RXON - " \
#c1 " != " #c2 " - %d != %d\n", \
(c1), (c2)); \
return 1; \
}
/* These items are only settable from the full RXON command */
CHK(!iwl_is_associated_ctx(ctx));
CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
CHK(!ether_addr_equal(staging->wlap_bssid_addr,
active->wlap_bssid_addr));
CHK_NEQ(staging->dev_type, active->dev_type);
CHK_NEQ(staging->channel, active->channel);
CHK_NEQ(staging->air_propagation, active->air_propagation);
CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
active->ofdm_ht_single_stream_basic_rates);
CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
active->ofdm_ht_dual_stream_basic_rates);
CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
active->ofdm_ht_triple_stream_basic_rates);
CHK_NEQ(staging->assoc_id, active->assoc_id);
/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
* be updated with the RXON_ASSOC command -- however only some
* flag transitions are allowed using RXON_ASSOC */
/* Check if we are not switching bands */
CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
active->flags & RXON_FLG_BAND_24G_MSK);
/* Check if we are switching association toggle */
CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
active->filter_flags & RXON_FILTER_ASSOC_MSK);
#undef CHK
#undef CHK_NEQ
return 0;
}
#ifdef CONFIG_IWLWIFI_DEBUG
void iwl_print_rx_config_cmd(struct iwl_priv *priv,
enum iwl_rxon_context_id ctxid)
{
struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
struct iwl_rxon_cmd *rxon = &ctx->staging;
IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
le16_to_cpu(rxon->channel));
IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
le32_to_cpu(rxon->flags));
IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
le32_to_cpu(rxon->filter_flags));
IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
rxon->ofdm_basic_rates);
IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
rxon->cck_basic_rates);
IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
le16_to_cpu(rxon->assoc_id));
}
#endif
static void iwl_calc_basic_rates(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int lowest_present_ofdm = 100;
int lowest_present_cck = 100;
u8 cck = 0;
u8 ofdm = 0;
if (ctx->vif) {
struct ieee80211_supported_band *sband;
unsigned long basic = ctx->vif->bss_conf.basic_rates;
int i;
sband = priv->hw->wiphy->bands[priv->hw->conf.channel->band];
for_each_set_bit(i, &basic, BITS_PER_LONG) {
int hw = sband->bitrates[i].hw_value;
if (hw >= IWL_FIRST_OFDM_RATE) {
ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
if (lowest_present_ofdm > hw)
lowest_present_ofdm = hw;
} else {
BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
cck |= BIT(hw);
if (lowest_present_cck > hw)
lowest_present_cck = hw;
}
}
}
/*
* Now we've got the basic rates as bitmaps in the ofdm and cck
* variables. This isn't sufficient though, as there might not
* be all the right rates in the bitmap. E.g. if the only basic
* rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
* and 6 Mbps because the 802.11-2007 standard says in 9.6:
*
* [...] a STA responding to a received frame shall transmit
* its Control Response frame [...] at the highest rate in the
* BSSBasicRateSet parameter that is less than or equal to the
* rate of the immediately previous frame in the frame exchange
* sequence ([...]) and that is of the same modulation class
* ([...]) as the received frame. If no rate contained in the
* BSSBasicRateSet parameter meets these conditions, then the
* control frame sent in response to a received frame shall be
* transmitted at the highest mandatory rate of the PHY that is
* less than or equal to the rate of the received frame, and
* that is of the same modulation class as the received frame.
*
* As a consequence, we need to add all mandatory rates that are
* lower than all of the basic rates to these bitmaps.
*/
if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
/* 6M already there or needed so always add */
ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
/*
* CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
* Note, however:
* - if no CCK rates are basic, it must be ERP since there must
* be some basic rates at all, so they're OFDM => ERP PHY
* (or we're in 5 GHz, and the cck bitmap will never be used)
* - if 11M is a basic rate, it must be ERP as well, so add 5.5M
* - if 5.5M is basic, 1M and 2M are mandatory
* - if 2M is basic, 1M is mandatory
* - if 1M is basic, that's the only valid ACK rate.
* As a consequence, it's not as complicated as it sounds, just add
* any lower rates to the ACK rate bitmap.
*/
if (IWL_RATE_11M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_5M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_2M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
/* 1M already there or needed so always add */
cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
cck, ofdm);
/* "basic_rates" is a misnomer here -- should be called ACK rates */
ctx->staging.cck_basic_rates = cck;
ctx->staging.ofdm_basic_rates = ofdm;
}
/**
* iwlagn_commit_rxon - commit staging_rxon to hardware
*
* The RXON command in staging_rxon is committed to the hardware and
* the active_rxon structure is updated with the new data. This
* function correctly transitions out of the RXON_ASSOC_MSK state if
* a HW tune is required based on the RXON structure changes.
*
* The connect/disconnect flow should be as the following:
*
* 1. make sure send RXON command with association bit unset if not connect
* this should include the channel and the band for the candidate
* to be connected to
* 2. Add Station before RXON association with the AP
* 3. RXON_timing has to send before RXON for connection
* 4. full RXON command - associated bit set
* 5. use RXON_ASSOC command to update any flags changes
*/
int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
/* cast away the const for active_rxon in this function */
struct iwl_rxon_cmd *active = (void *)&ctx->active;
bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
int ret;
lockdep_assert_held(&priv->mutex);
if (!iwl_is_alive(priv))
return -EBUSY;
/* This function hardcodes a bunch of dual-mode assumptions */
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
if (!ctx->is_active)
return 0;
/* always get timestamp with Rx frame */
ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
/* recalculate basic rates */
iwl_calc_basic_rates(priv, ctx);
/*
* force CTS-to-self frames protection if RTS-CTS is not preferred
* one aggregation protection method
*/
if (!priv->hw_params.use_rts_for_aggregation)
ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
iwl_print_rx_config_cmd(priv, ctx->ctxid);
ret = iwl_check_rxon_cmd(priv, ctx);
if (ret) {
IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
return -EINVAL;
}
/*
* receive commit_rxon request
* abort any previous channel switch if still in process
*/
if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
(priv->switch_channel != ctx->staging.channel)) {
IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
le16_to_cpu(priv->switch_channel));
iwl_chswitch_done(priv, false);
}
/*
* If we don't need to send a full RXON, we can use
* iwl_rxon_assoc_cmd which is used to reconfigure filter
* and other flags for the current radio configuration.
*/
if (!iwl_full_rxon_required(priv, ctx)) {
ret = iwlagn_send_rxon_assoc(priv, ctx);
if (ret) {
IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
return ret;
}
memcpy(active, &ctx->staging, sizeof(*active));
/*
* We do not commit tx power settings while channel changing,
* do it now if after settings changed.
*/
iwl_set_tx_power(priv, priv->tx_power_next, false);
/* make sure we are in the right PS state */
iwl_power_update_mode(priv, true);
return 0;
}
iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
IWL_DEBUG_INFO(priv,
"Going to commit RXON\n"
" * with%s RXON_FILTER_ASSOC_MSK\n"
" * channel = %d\n"
" * bssid = %pM\n",
(new_assoc ? "" : "out"),
le16_to_cpu(ctx->staging.channel),
ctx->staging.bssid_addr);
/*
* Always clear associated first, but with the correct config.
* This is required as for example station addition for the
* AP station must be done after the BSSID is set to correctly
* set up filters in the device.
*/
ret = iwlagn_rxon_disconn(priv, ctx);
if (ret)
return ret;
ret = iwlagn_set_pan_params(priv);
if (ret)
return ret;
if (new_assoc)
return iwlagn_rxon_connect(priv, ctx);
return 0;
}
void iwlagn_config_ht40(struct ieee80211_conf *conf,
struct iwl_rxon_context *ctx)
{
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;
}
}
int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_rxon_context *ctx;
struct ieee80211_conf *conf = &hw->conf;
struct ieee80211_channel *channel = conf->channel;
int ret = 0;
IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
mutex_lock(&priv->mutex);
if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
goto out;
}
if (!iwl_is_ready(priv)) {
IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
goto out;
}
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.
*/
for_each_context(priv, ctx)
iwlagn_set_rxon_chain(priv, ctx);
}
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
for_each_context(priv, ctx) {
/* Configure HT40 channels */
if (ctx->ht.enabled != conf_is_ht(conf))
ctx->ht.enabled = conf_is_ht(conf);
if (ctx->ht.enabled) {
/* if HT40 is used, it should not change
* after associated except channel switch */
if (!ctx->ht.is_40mhz ||
!iwl_is_associated_ctx(ctx))
iwlagn_config_ht40(conf, ctx);
} 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) !=
channel->hw_value)
ctx->staging.flags = 0;
iwl_set_rxon_channel(priv, channel, ctx);
iwl_set_rxon_ht(priv, &priv->current_ht_config);
iwl_set_flags_for_band(priv, ctx, channel->band,
ctx->vif);
}
iwl_update_bcast_stations(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);
}
for_each_context(priv, ctx) {
if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
continue;
iwlagn_commit_rxon(priv, ctx);
}
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return ret;
}
static void iwlagn_check_needed_chains(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_vif *vif = ctx->vif;
struct iwl_rxon_context *tmp;
struct ieee80211_sta *sta;
struct iwl_ht_config *ht_conf = &priv->current_ht_config;
struct ieee80211_sta_ht_cap *ht_cap;
bool need_multiple;
lockdep_assert_held(&priv->mutex);
switch (vif->type) {
case NL80211_IFTYPE_STATION:
rcu_read_lock();
sta = ieee80211_find_sta(vif, bss_conf->bssid);
if (!sta) {
/*
* 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.
*/
need_multiple = false;
rcu_read_unlock();
break;
}
ht_cap = &sta->ht_cap;
need_multiple = true;
/*
* If the peer advertises no support for receiving 2 and 3
* stream MCS rates, it can't be transmitting them either.
*/
if (ht_cap->mcs.rx_mask[1] == 0 &&
ht_cap->mcs.rx_mask[2] == 0) {
need_multiple = false;
} else if (!(ht_cap->mcs.tx_params &
IEEE80211_HT_MCS_TX_DEFINED)) {
/* If it can't TX MCS at all ... */
need_multiple = false;
} else if (ht_cap->mcs.tx_params &
IEEE80211_HT_MCS_TX_RX_DIFF) {
int maxstreams;
/*
* But if it can receive them, it might still not
* be able to transmit them, which is what we need
* to check here -- so check the number of streams
* it advertises for TX (if different from RX).
*/
maxstreams = (ht_cap->mcs.tx_params &
IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
maxstreams >>=
IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
maxstreams += 1;
if (maxstreams <= 1)
need_multiple = false;
}
rcu_read_unlock();
break;
case NL80211_IFTYPE_ADHOC:
/* currently */
need_multiple = false;
break;
default:
/* only AP really */
need_multiple = true;
break;
}
ctx->ht_need_multiple_chains = need_multiple;
if (!need_multiple) {
/* check all contexts */
for_each_context(priv, tmp) {
if (!tmp->vif)
continue;
if (tmp->ht_need_multiple_chains) {
need_multiple = true;
break;
}
}
}
ht_conf->single_chain_sufficient = !need_multiple;
}
static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
{
struct iwl_chain_noise_data *data = &priv->chain_noise_data;
int ret;
if (!(priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED))
return;
if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
iwl_is_any_associated(priv)) {
struct iwl_calib_chain_noise_reset_cmd cmd;
/* clear data for chain noise calibration algorithm */
data->chain_noise_a = 0;
data->chain_noise_b = 0;
data->chain_noise_c = 0;
data->chain_signal_a = 0;
data->chain_signal_b = 0;
data->chain_signal_c = 0;
data->beacon_count = 0;
memset(&cmd, 0, sizeof(cmd));
iwl_set_calib_hdr(&cmd.hdr,
priv->phy_calib_chain_noise_reset_cmd);
ret = iwl_dvm_send_cmd_pdu(priv,
REPLY_PHY_CALIBRATION_CMD,
CMD_SYNC, sizeof(cmd), &cmd);
if (ret)
IWL_ERR(priv,
"Could not send REPLY_PHY_CALIBRATION_CMD\n");
data->state = IWL_CHAIN_NOISE_ACCUMULATE;
IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
}
}
void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changes)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
int ret;
bool force = false;
mutex_lock(&priv->mutex);
if (unlikely(!iwl_is_ready(priv))) {
IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
mutex_unlock(&priv->mutex);
return;
}
if (unlikely(!ctx->vif)) {
IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
mutex_unlock(&priv->mutex);
return;
}
if (changes & BSS_CHANGED_BEACON_INT)
force = true;
if (changes & BSS_CHANGED_QOS) {
ctx->qos_data.qos_active = bss_conf->qos;
iwlagn_update_qos(priv, ctx);
}
ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
if (vif->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_ASSOC) {
if (bss_conf->assoc) {
priv->timestamp = bss_conf->last_tsf;
ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
} else {
/*
* If we disassociate while there are pending
* frames, just wake up the queues and let the
* frames "escape" ... This shouldn't really
* be happening to start with, but we should
* not get stuck in this case either since it
* can happen if userspace gets confused.
*/
iwlagn_lift_passive_no_rx(priv);
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
if (ctx->ctxid == IWL_RXON_CTX_BSS)
priv->have_rekey_data = false;
}
iwlagn_bt_coex_rssi_monitor(priv);
}
if (ctx->ht.enabled) {
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);
iwlagn_check_needed_chains(priv, ctx, bss_conf);
iwl_set_rxon_ht(priv, &priv->current_ht_config);
}
iwlagn_set_rxon_chain(priv, ctx);
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;
memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
if (vif->type == NL80211_IFTYPE_AP ||
vif->type == NL80211_IFTYPE_ADHOC) {
if (vif->bss_conf.enable_beacon) {
ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
priv->beacon_ctx = ctx;
} else {
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
priv->beacon_ctx = NULL;
}
}
/*
* If the ucode decides to do beacon filtering before
* association, it will lose beacons that are needed
* before sending frames out on passive channels. This
* causes association failures on those channels. Enable
* receiving beacons in such cases.
*/
if (vif->type == NL80211_IFTYPE_STATION) {
if (!bss_conf->assoc)
ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
else
ctx->staging.filter_flags &=
~RXON_FILTER_BCON_AWARE_MSK;
}
if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
iwlagn_commit_rxon(priv, ctx);
if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
/*
* The chain noise calibration will enable PM upon
* completion. If calibration has already been run
* then we need to enable power management here.
*/
if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
iwl_power_update_mode(priv, false);
/* Enable RX differential gain and sensitivity calibrations */
iwlagn_chain_noise_reset(priv);
priv->start_calib = 1;
}
if (changes & BSS_CHANGED_IBSS) {
ret = iwlagn_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);
}
if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
priv->beacon_ctx) {
if (iwlagn_update_beacon(priv, vif))
IWL_ERR(priv, "Error sending IBSS beacon\n");
}
mutex_unlock(&priv->mutex);
}
void iwlagn_post_scan(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
/*
* We do not commit power settings while scan is pending,
* do it now if the settings changed.
*/
iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
iwl_set_tx_power(priv, priv->tx_power_next, false);
/*
* Since setting the RXON may have been deferred while
* performing the scan, fire one off if needed
*/
for_each_context(priv, ctx)
if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
iwlagn_commit_rxon(priv, ctx);
iwlagn_set_pan_params(priv);
}