/**
* 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.
*/
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);
bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
int ret;
lockdep_assert_held(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return -EINVAL;
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;
if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
iwl_set_rxon_channel(priv, chan, ctx);
iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
ctx->staging.filter_flags |=
RXON_FILTER_ASSOC_MSK |
RXON_FILTER_PROMISC_MSK |
RXON_FILTER_CTL2HOST_MSK;
ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
new_assoc = true;
if (memcmp(&ctx->staging, &ctx->active,
sizeof(ctx->staging)) == 0)
return 0;
}
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;
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 (priv->switch_rxon.switch_in_progress &&
(priv->switch_rxon.channel != ctx->staging.channel)) {
IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
le16_to_cpu(priv->switch_rxon.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 = iwl_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));
iwl_print_rx_config_cmd(priv, ctx);
return 0;
}
if (priv->cfg->ops->hcmd->set_pan_params) {
ret = priv->cfg->ops->hcmd->set_pan_params(priv);
if (ret)
return ret;
}
iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->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.
*/
if ((old_assoc && new_assoc) || !new_assoc) {
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;
memcpy(active, &ctx->staging, sizeof(*active));
/*
* Un-assoc RXON clears the station table and WEP
* keys, so we have to restore those afterwards.
*/
iwl_clear_ucode_stations(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;
}
}
/* RXON timing must be before associated RXON */
ret = iwl_send_rxon_timing(priv, ctx);
if (ret) {
IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
return ret;
}
if (new_assoc) {
/* 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_send_cmd_pdu(priv, ctx->rxon_cmd,
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));
iwl_reprogram_ap_sta(priv, ctx);
/* 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_print_rx_config_cmd(priv, ctx);
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;
}
return 0;
}
/**
* 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 (test_bit(STATUS_EXIT_PENDING, &priv->status))
return -EINVAL;
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;
if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
iwl_set_rxon_channel(priv, chan, ctx);
iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
ctx->staging.filter_flags |=
RXON_FILTER_ASSOC_MSK |
RXON_FILTER_PROMISC_MSK |
RXON_FILTER_CTL2HOST_MSK;
ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
new_assoc = true;
if (memcmp(&ctx->staging, &ctx->active,
sizeof(ctx->staging)) == 0)
return 0;
}
/*
* force CTS-to-self frames protection if RTS-CTS is not preferred
* one aggregation protection method
*/
if (!(priv->cfg->ht_params &&
priv->cfg->ht_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);
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);
return 0;
}
if (priv->cfg->ops->hcmd->set_pan_params) {
ret = priv->cfg->ops->hcmd->set_pan_params(priv);
if (ret)
return ret;
}
iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_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;
if (new_assoc)
return iwlagn_rxon_connect(priv, ctx);
return 0;
}