int iwl_scan_initiate(struct iwl_priv *priv)
{
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
return -EIO;
}
if (test_bit(STATUS_SCANNING, &priv->status)) {
IWL_DEBUG_SCAN("Scan already in progress.\n");
return -EAGAIN;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_SCAN("Scan request while abort pending\n");
return -EAGAIN;
}
IWL_DEBUG_INFO("Starting scan...\n");
if (priv->cfg->sku & IWL_SKU_G)
priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
if (priv->cfg->sku & IWL_SKU_A)
priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
set_bit(STATUS_SCANNING, &priv->status);
priv->scan_start = jiffies;
priv->scan_pass_start = priv->scan_start;
queue_work(priv->workqueue, &priv->request_scan);
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->nvm_data->max_tx_pwr_half_dbm, 2)) {
IWL_WARN(priv,
"Requested user TXPOWER %d above upper limit %d.\n",
tx_power, priv->nvm_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;
}
int iwl_mac_hw_scan(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct cfg80211_scan_request *req)
{
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (req->n_channels == 0)
return -EINVAL;
mutex_lock(&priv->mutex);
if (!iwl_is_ready_rf(priv)) {
ret = -EIO;
IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
goto out_unlock;
}
if (test_bit(STATUS_SCANNING, &priv->status) &&
!priv->is_internal_short_scan) {
IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
ret = -EAGAIN;
goto out_unlock;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
ret = -EAGAIN;
goto out_unlock;
}
/* mac80211 will only ask for one band at a time */
priv->scan_band = req->channels[0]->band;
priv->scan_request = req;
priv->scan_vif = vif;
/*
* If an internal scan is in progress, just set
* up the scan_request as per above.
*/
if (priv->is_internal_short_scan)
ret = 0;
else
ret = iwl_scan_initiate(priv, vif);
IWL_DEBUG_MAC80211(priv, "leave\n");
out_unlock:
mutex_unlock(&priv->mutex);
return ret;
}
static void iwl_process_scan_complete(struct iwl_priv *priv)
{
bool aborted;
lockdep_assert_held(&priv->mutex);
if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status))
return;
IWL_DEBUG_SCAN(priv, "Completed scan.\n");
cancel_delayed_work(&priv->scan_check);
aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status);
if (aborted)
IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n");
if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Scan already completed.\n");
goto out_settings;
}
if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) {
int err;
/* Check if mac80211 requested scan during our internal scan */
if (priv->scan_request == NULL)
goto out_complete;
/* If so request a new scan */
err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL,
priv->scan_request->channels[0]->band);
if (err) {
IWL_DEBUG_SCAN(priv,
"failed to initiate pending scan: %d\n", err);
aborted = true;
goto out_complete;
}
return;
}
out_complete:
iwl_complete_scan(priv, aborted);
out_settings:
/* Can we still talk to firmware ? */
if (!iwl_is_ready_rf(priv))
return;
iwlagn_post_scan(priv);
}
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");
}
int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
bool force)
{
int ret;
bool update_chains;
lockdep_assert_held(&priv->mutex);
/* Don't update the RX chain when chain noise calibration is running */
update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
return 0;
if (!iwl_is_ready_rf(priv))
return -EIO;
/* scan complete use sleep_power_next, need to be updated */
memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n");
return 0;
}
if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
set_bit(STATUS_POWER_PMI, &priv->status);
ret = iwl_set_power(priv, cmd);
if (!ret) {
if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
clear_bit(STATUS_POWER_PMI, &priv->status);
if (priv->cfg->ops->lib->update_chain_flags && update_chains)
priv->cfg->ops->lib->update_chain_flags(priv);
else if (priv->cfg->ops->lib->update_chain_flags)
IWL_DEBUG_POWER(priv,
"Cannot update the power, chain noise "
"calibration running: %d\n",
priv->chain_noise_data.state);
memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd));
} else
IWL_ERR(priv, "set power fail, ret = %d", ret);
return ret;
}
/*
* compute the final power mode index
*/
int iwl_power_update_mode(struct iwl_priv *priv, bool force)
{
struct iwl_power_mgr *setting = &(priv->power_data);
int ret = 0;
u16 uninitialized_var(final_mode);
bool update_chains;
/* Don't update the RX chain when chain noise calibration is running */
update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
final_mode = priv->power_data.user_power_setting;
if (setting->power_disabled)
final_mode = IWL_POWER_MODE_CAM;
if (iwl_is_ready_rf(priv) &&
((setting->power_mode != final_mode) || force)) {
struct iwl_powertable_cmd cmd;
if (final_mode != IWL_POWER_MODE_CAM)
set_bit(STATUS_POWER_PMI, &priv->status);
iwl_update_power_cmd(priv, &cmd, final_mode);
cmd.keep_alive_beacons = 0;
if (final_mode == IWL_POWER_INDEX_5)
cmd.flags |= IWL_POWER_FAST_PD;
ret = iwl_set_power(priv, &cmd);
if (final_mode == IWL_POWER_MODE_CAM)
clear_bit(STATUS_POWER_PMI, &priv->status);
if (priv->cfg->ops->lib->update_chain_flags && update_chains)
priv->cfg->ops->lib->update_chain_flags(priv);
else
IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise "
"calibration running: %d\n",
priv->chain_noise_data.state);
if (!ret)
setting->power_mode = final_mode;
}
return ret;
}
void iwl_bg_start_internal_scan(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, start_internal_scan);
mutex_lock(&priv->mutex);
if (priv->is_internal_short_scan == true) {
IWL_DEBUG_SCAN(priv, "Internal scan already in progress\n");
goto unlock;
}
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_SCAN(priv, "not ready or exit pending\n");
goto unlock;
}
if (test_bit(STATUS_SCANNING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
goto unlock;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
goto unlock;
}
priv->scan_band = priv->band;
IWL_DEBUG_SCAN(priv, "Start internal short scan...\n");
set_bit(STATUS_SCANNING, &priv->status);
priv->is_internal_short_scan = true;
if (WARN_ON(!priv->cfg->ops->utils->request_scan))
goto unlock;
priv->cfg->ops->utils->request_scan(priv, NULL);
unlock:
mutex_unlock(&priv->mutex);
}
int iwl_power_update_mode(struct iwl_priv *priv, bool force)
{
int ret = 0;
struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
bool enabled = (priv->iw_mode == NL80211_IFTYPE_STATION) &&
(priv->hw->conf.flags & IEEE80211_CONF_PS);
bool update_chains;
struct iwl_powertable_cmd cmd;
int dtimper;
/* Don't update the RX chain when chain noise calibration is running */
update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
if (priv->vif)
dtimper = priv->vif->bss_conf.dtim_period;
else
dtimper = 1;
if (priv->cfg->broken_powersave)
iwl_power_sleep_cam_cmd(priv, &cmd);
else if (priv->cfg->supports_idle &&
priv->hw->conf.flags & IEEE80211_CONF_IDLE)
iwl_static_sleep_cmd(priv, &cmd, IWL_POWER_INDEX_5, 20);
else if (tt->state >= IWL_TI_1)
iwl_static_sleep_cmd(priv, &cmd, tt->tt_power_mode, dtimper);
else if (!enabled)
iwl_power_sleep_cam_cmd(priv, &cmd);
else if (priv->power_data.debug_sleep_level_override >= 0)
iwl_static_sleep_cmd(priv, &cmd,
priv->power_data.debug_sleep_level_override,
dtimper);
else if (no_sleep_autoadjust)
iwl_static_sleep_cmd(priv, &cmd, IWL_POWER_INDEX_1, dtimper);
else
iwl_power_fill_sleep_cmd(priv, &cmd,
priv->hw->conf.dynamic_ps_timeout,
priv->hw->conf.max_sleep_period);
if (iwl_is_ready_rf(priv) &&
(memcmp(&priv->power_data.sleep_cmd, &cmd, sizeof(cmd)) || force)) {
if (cmd.flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
set_bit(STATUS_POWER_PMI, &priv->status);
ret = iwl_set_power(priv, &cmd);
if (!ret) {
if (!(cmd.flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
clear_bit(STATUS_POWER_PMI, &priv->status);
if (priv->cfg->ops->lib->update_chain_flags &&
update_chains)
priv->cfg->ops->lib->update_chain_flags(priv);
else if (priv->cfg->ops->lib->update_chain_flags)
IWL_DEBUG_POWER(priv,
"Cannot update the power, chain noise "
"calibration running: %d\n",
priv->chain_noise_data.state);
memcpy(&priv->power_data.sleep_cmd, &cmd, sizeof(cmd));
} else
IWL_ERR(priv, "set power fail, ret = %d", ret);
}
return ret;
}
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
int ret;
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_ABORT_CMD,
.flags = CMD_SYNC | CMD_WANT_SKB,
};
__le32 *status;
/* Exit instantly with error when device is not ready
* to receive scan abort command or it does not perform
* hardware scan currently */
if (!test_bit(STATUS_READY, &priv->status) ||
!test_bit(STATUS_SCAN_HW, &priv->status) ||
test_bit(STATUS_FW_ERROR, &priv->status))
return -EIO;
ret = iwl_dvm_send_cmd(priv, &cmd);
if (ret)
return ret;
status = (void *)cmd.resp_pkt->data;
if (*status != CAN_ABORT_STATUS) {
/* The scan abort will return 1 for success or
* 2 for "failure". A failure condition can be
* due to simply not being in an active scan which
* can occur if we send the scan abort before we
* the microcode has notified us that a scan is
* completed. */
IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n",
le32_to_cpu(*status));
ret = -EIO;
}
iwl_free_resp(&cmd);
return ret;
}
static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)
{
/* check if scan was requested from mac80211 */
if (priv->scan_request) {
IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");
ieee80211_scan_completed(priv->hw, aborted);
}
priv->scan_type = IWL_SCAN_NORMAL;
priv->scan_vif = NULL;
priv->scan_request = NULL;
}
static void iwl_process_scan_complete(struct iwl_priv *priv)
{
bool aborted;
lockdep_assert_held(&priv->mutex);
if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status))
return;
IWL_DEBUG_SCAN(priv, "Completed scan.\n");
cancel_delayed_work(&priv->scan_check);
aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status);
if (aborted)
IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n");
if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Scan already completed.\n");
goto out_settings;
}
if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) {
int err;
/* Check if mac80211 requested scan during our internal scan */
if (priv->scan_request == NULL)
goto out_complete;
/* If so request a new scan */
err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL,
priv->scan_request->channels[0]->band);
if (err) {
IWL_DEBUG_SCAN(priv,
"failed to initiate pending scan: %d\n", err);
aborted = true;
goto out_complete;
}
return;
}
out_complete:
iwl_complete_scan(priv, aborted);
out_settings:
/* Can we still talk to firmware ? */
if (!iwl_is_ready_rf(priv))
return;
iwlagn_post_scan(priv);
}
int iwl_mac_hw_scan(struct ieee80211_hw *hw,
struct cfg80211_scan_request *req)
{
unsigned long flags;
struct iwl_priv *priv = hw->priv;
int ret;
u8 *ssid = NULL;
size_t ssid_len = 0;
if (req->n_ssids) {
ssid = req->ssids[0].ssid;
ssid_len = req->ssids[0].ssid_len;
}
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
spin_lock_irqsave(&priv->lock, flags);
if (!iwl_is_ready_rf(priv)) {
ret = -EIO;
IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
goto out_unlock;
}
/* We don't schedule scan within next_scan_jiffies period.
* Avoid scanning during possible EAPOL exchange, return
* success immediately.
*/
if (priv->next_scan_jiffies &&
time_after(priv->next_scan_jiffies, jiffies)) {
IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n");
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
/* if we just finished scan ask for delay */
if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
IWL_DEBUG_SCAN(priv, "scan rejected: within previous scan period\n");
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
if (ssid_len) {
priv->one_direct_scan = 1;
priv->direct_ssid_len = ssid_len;
memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
} else {
priv->one_direct_scan = 0;
}
ret = iwl_scan_initiate(priv);
IWL_DEBUG_MAC80211(priv, "leave\n");
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
mutex_unlock(&priv->mutex);
return ret;
}
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
int ret;
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_ABORT_CMD,
.flags = CMD_SYNC | CMD_WANT_SKB,
};
__le32 *status;
if (!test_bit(STATUS_READY, &priv->status) ||
!test_bit(STATUS_GEO_CONFIGURED, &priv->status) ||
!test_bit(STATUS_SCAN_HW, &priv->status) ||
test_bit(STATUS_FW_ERROR, &priv->shrd->status))
return -EIO;
ret = iwl_dvm_send_cmd(priv, &cmd);
if (ret)
return ret;
status = (void *)cmd.resp_pkt->data;
if (*status != CAN_ABORT_STATUS) {
IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n",
le32_to_cpu(*status));
ret = -EIO;
}
iwl_free_resp(&cmd);
return ret;
}
static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)
{
if (priv->scan_request) {
IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");
ieee80211_scan_completed(priv->hw, aborted);
}
if (priv->scan_type == IWL_SCAN_ROC) {
ieee80211_remain_on_channel_expired(priv->hw);
priv->hw_roc_channel = NULL;
schedule_delayed_work(&priv->hw_roc_disable_work, 10 * HZ);
}
priv->scan_type = IWL_SCAN_NORMAL;
priv->scan_vif = NULL;
priv->scan_request = NULL;
}
static void iwl_process_scan_complete(struct iwl_priv *priv)
{
bool aborted;
lockdep_assert_held(&priv->mutex);
if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status))
return;
IWL_DEBUG_SCAN(priv, "Completed scan.\n");
cancel_delayed_work(&priv->scan_check);
aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status);
if (aborted)
IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n");
if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Scan already completed.\n");
goto out_settings;
}
if (priv->scan_type == IWL_SCAN_ROC) {
ieee80211_remain_on_channel_expired(priv->hw);
priv->hw_roc_channel = NULL;
schedule_delayed_work(&priv->hw_roc_disable_work, 10 * HZ);
}
if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) {
int err;
if (priv->scan_request == NULL)
goto out_complete;
err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL,
priv->scan_request->channels[0]->band);
if (err) {
IWL_DEBUG_SCAN(priv,
"failed to initiate pending scan: %d\n", err);
aborted = true;
goto out_complete;
}
return;
}
out_complete:
iwl_complete_scan(priv, aborted);
out_settings:
if (!iwl_is_ready_rf(priv))
return;
iwlagn_post_scan(priv);
}