--- /dev/null
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ *
+ * 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 COPYING.
+ *
+ * Contact Information:
+ * Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#include <linux/ieee80211.h>
+#include <linux/etherdevice.h>
+
+#include "iwl-trans.h"
+#include "iwl-eeprom-parse.h"
+#include "mvm.h"
+#include "sta.h"
+
+/*
+ * Sets most of the Tx cmd's fields
+ */
+void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
+ struct iwl_tx_cmd *tx_cmd,
+ struct ieee80211_tx_info *info, u8 sta_id)
+{
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ __le16 fc = hdr->frame_control;
+ u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
+ u32 len = skb->len + FCS_LEN;
+ u8 ac;
+
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
+ tx_flags |= TX_CMD_FLG_ACK;
+ else
+ tx_flags &= ~TX_CMD_FLG_ACK;
+
+ if (ieee80211_is_probe_resp(fc))
+ tx_flags |= TX_CMD_FLG_TSF;
+
+ if (ieee80211_has_morefrags(fc))
+ tx_flags |= TX_CMD_FLG_MORE_FRAG;
+
+ if (ieee80211_is_data_qos(fc)) {
+ u8 *qc = ieee80211_get_qos_ctl(hdr);
+ tx_cmd->tid_tspec = qc[0] & 0xf;
+ tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
+ } else if (ieee80211_is_back_req(fc)) {
+ struct ieee80211_bar *bar = (void *)skb->data;
+ u16 control = le16_to_cpu(bar->control);
+
+ tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
+ tx_cmd->tid_tspec = (control &
+ IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
+ IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
+ WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
+ } else {
+ tx_cmd->tid_tspec = IWL_TID_NON_QOS;
+ if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
+ tx_flags |= TX_CMD_FLG_SEQ_CTL;
+ else
+ tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
+ }
+
+ /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
+ if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
+ ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
+ else
+ ac = tid_to_mac80211_ac[0];
+
+ tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
+ TX_CMD_FLG_BT_PRIO_POS;
+
+ if (ieee80211_is_mgmt(fc)) {
+ if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
+ tx_cmd->pm_frame_timeout = cpu_to_le16(3);
+ else
+ tx_cmd->pm_frame_timeout = cpu_to_le16(2);
+
+ /* The spec allows Action frames in A-MPDU, we don't support
+ * it
+ */
+ WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
+ } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
+ tx_cmd->pm_frame_timeout = cpu_to_le16(2);
+ } else {
+ tx_cmd->pm_frame_timeout = 0;
+ }
+
+ if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
+ !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
+ tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
+
+ if ((mvm->fw->ucode_capa.capa[0] &
+ IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
+ ieee80211_action_contains_tpc(skb))
+ tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
+
+ tx_cmd->tx_flags = cpu_to_le32(tx_flags);
+ /* Total # bytes to be transmitted */
+ tx_cmd->len = cpu_to_le16((u16)skb->len);
+ tx_cmd->next_frame_len = 0;
+ tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
+ tx_cmd->sta_id = sta_id;
+}
+
+/*
+ * Sets the fields in the Tx cmd that are rate related
+ */
+void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
+ struct ieee80211_tx_info *info,
+ struct ieee80211_sta *sta, __le16 fc)
+{
+ u32 rate_flags;
+ int rate_idx;
+ u8 rate_plcp;
+
+ /* Set retry limit on RTS packets */
+ tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
+
+ /* Set retry limit on DATA packets and Probe Responses*/
+ if (ieee80211_is_probe_resp(fc)) {
+ tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
+ tx_cmd->rts_retry_limit =
+ min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
+ } else if (ieee80211_is_back_req(fc)) {
+ tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
+ } else {
+ tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
+ }
+
+ /*
+ * for data packets, rate info comes from the table inside the fw. This
+ * table is controlled by LINK_QUALITY commands
+ */
+
+ if (ieee80211_is_data(fc) && sta) {
+ tx_cmd->initial_rate_index = 0;
+ tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
+ return;
+ } else if (ieee80211_is_back_req(fc)) {
+ tx_cmd->tx_flags |=
+ cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
+ }
+
+ /* HT rate doesn't make sense for a non data frame */
+ WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
+ "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
+ info->control.rates[0].flags,
+ info->control.rates[0].idx,
+ le16_to_cpu(fc));
+
+ rate_idx = info->control.rates[0].idx;
+ /* if the rate isn't a well known legacy rate, take the lowest one */
+ if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
+ rate_idx = rate_lowest_index(
+ &mvm->nvm_data->bands[info->band], sta);
+
+ /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
+ if (info->band == IEEE80211_BAND_5GHZ)
+ rate_idx += IWL_FIRST_OFDM_RATE;
+
+ /* For 2.4 GHZ band, check that there is no need to remap */
+ BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
+
+ /* Get PLCP rate for tx_cmd->rate_n_flags */
+ rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
+
+ mvm->mgmt_last_antenna_idx =
+ iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
+ mvm->mgmt_last_antenna_idx);
+
+ if (info->band == IEEE80211_BAND_2GHZ &&
+ !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
+ rate_flags = BIT(mvm->cfg->non_shared_ant) << RATE_MCS_ANT_POS;
+ else
+ rate_flags =
+ BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
+
+ /* Set CCK flag as needed */
+ if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
+ rate_flags |= RATE_MCS_CCK_MSK;
+
+ /* Set the rate in the TX cmd */
+ tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
+}
+
+/*
+ * Sets the fields in the Tx cmd that are crypto related
+ */
+void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
+ struct ieee80211_tx_info *info,
+ struct iwl_tx_cmd *tx_cmd,
+ struct sk_buff *skb_frag)
+{
+ struct ieee80211_key_conf *keyconf = info->control.hw_key;
+
+ switch (keyconf->cipher) {
+ case WLAN_CIPHER_SUITE_CCMP:
+ tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
+ memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
+ if (info->flags & IEEE80211_TX_CTL_AMPDU)
+ tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
+ break;
+
+ case WLAN_CIPHER_SUITE_TKIP:
+ tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
+ ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
+ break;
+
+ case WLAN_CIPHER_SUITE_WEP104:
+ tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
+ /* fall through */
+ case WLAN_CIPHER_SUITE_WEP40:
+ tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
+ ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
+ TX_CMD_SEC_WEP_KEY_IDX_MSK);
+
+ memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
+ break;
+ default:
+ tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
+ }
+}
+
+/*
+ * Allocates and sets the Tx cmd the driver data pointers in the skb
+ */
+static struct iwl_device_cmd *
+iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
+ struct ieee80211_sta *sta, u8 sta_id)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct iwl_device_cmd *dev_cmd;
+ struct iwl_tx_cmd *tx_cmd;
+
+ dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
+
+ if (unlikely(!dev_cmd))
+ return NULL;
+
+ memset(dev_cmd, 0, sizeof(*dev_cmd));
+ dev_cmd->hdr.cmd = TX_CMD;
+ tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
+
+ if (info->control.hw_key)
+ iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
+
+ iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
+
+ iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
+
+ memset(&info->status, 0, sizeof(info->status));
+
+ info->driver_data[0] = NULL;
+ info->driver_data[1] = dev_cmd;
+
+ return dev_cmd;
+}
+
+int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct iwl_device_cmd *dev_cmd;
+ struct iwl_tx_cmd *tx_cmd;
+ u8 sta_id;
+
+ if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
+ return -1;
+
+ if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
+ (!info->control.vif ||
+ info->hw_queue != info->control.vif->cab_queue)))
+ return -1;
+
+ /*
+ * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
+ * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
+ * queue. STATION (HS2.0) uses the auxiliary context of the FW,
+ * and hence needs to be sent on the aux queue
+ */
+ if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
+ info->control.vif->type == NL80211_IFTYPE_STATION)
+ IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
+
+ /*
+ * If the interface on which frame is sent is the P2P_DEVICE
+ * or an AP/GO interface use the broadcast station associated
+ * with it; otherwise use the AUX station.
+ */
+ if (info->control.vif &&
+ (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
+ info->control.vif->type == NL80211_IFTYPE_AP)) {
+ struct iwl_mvm_vif *mvmvif =
+ iwl_mvm_vif_from_mac80211(info->control.vif);
+ sta_id = mvmvif->bcast_sta.sta_id;
+ } else {
+ sta_id = mvm->aux_sta.sta_id;
+ }
+
+ IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
+
+ dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
+ if (!dev_cmd)
+ return -1;
+
+ /* From now on, we cannot access info->control */
+ tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
+
+ /* Copy MAC header from skb into command buffer */
+ memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
+
+ if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
+ iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Sets the fields in the Tx cmd that are crypto related
+ */
+int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
+ struct ieee80211_sta *sta)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct iwl_mvm_sta *mvmsta;
+ struct iwl_device_cmd *dev_cmd;
+ struct iwl_tx_cmd *tx_cmd;
+ __le16 fc;
+ u16 seq_number = 0;
+ u8 tid = IWL_MAX_TID_COUNT;
+ u8 txq_id = info->hw_queue;
+ bool is_data_qos = false, is_ampdu = false;
+
+ mvmsta = iwl_mvm_sta_from_mac80211(sta);
+ fc = hdr->frame_control;
+
+ if (WARN_ON_ONCE(!mvmsta))
+ return -1;
+
+ if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
+ return -1;
+
+ dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
+ if (!dev_cmd)
+ goto drop;
+
+ tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
+ /* From now on, we cannot access info->control */
+
+ /*
+ * we handle that entirely ourselves -- for uAPSD the firmware
+ * will always send a notification, and for PS-Poll responses
+ * we'll notify mac80211 when getting frame status
+ */
+ info->flags &= ~IEEE80211_TX_STATUS_EOSP;
+
+ spin_lock(&mvmsta->lock);
+
+ if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
+ u8 *qc = NULL;
+ qc = ieee80211_get_qos_ctl(hdr);
+ tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
+ if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
+ goto drop_unlock_sta;
+
+ seq_number = mvmsta->tid_data[tid].seq_number;
+ seq_number &= IEEE80211_SCTL_SEQ;
+ hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+ hdr->seq_ctrl |= cpu_to_le16(seq_number);
+ is_data_qos = true;
+ is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
+ }
+
+ /* Copy MAC header from skb into command buffer */
+ memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
+
+ WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
+
+ if (sta->tdls) {
+ /* default to TID 0 for non-QoS packets */
+ u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
+
+ txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
+ }
+
+ if (is_ampdu) {
+ if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
+ goto drop_unlock_sta;
+ txq_id = mvmsta->tid_data[tid].txq_id;
+ }
+
+ IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
+ tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
+
+ if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
+ goto drop_unlock_sta;
+
+ if (is_data_qos && !ieee80211_has_morefrags(fc))
+ mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
+
+ spin_unlock(&mvmsta->lock);
+
+ if (txq_id < mvm->first_agg_queue)
+ atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
+
+ return 0;
+
+drop_unlock_sta:
+ iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
+ spin_unlock(&mvmsta->lock);
+drop:
+ return -1;
+}
+
+static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
+ struct ieee80211_sta *sta, u8 tid)
+{
+ struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
+ struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
+ struct ieee80211_vif *vif = mvmsta->vif;
+
+ lockdep_assert_held(&mvmsta->lock);
+
+ if ((tid_data->state == IWL_AGG_ON ||
+ tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
+ iwl_mvm_tid_queued(tid_data) == 0) {
+ /*
+ * Now that this aggregation queue is empty tell mac80211 so it
+ * knows we no longer have frames buffered for the station on
+ * this TID (for the TIM bitmap calculation.)
+ */
+ ieee80211_sta_set_buffered(sta, tid, false);
+ }
+
+ if (tid_data->ssn != tid_data->next_reclaimed)
+ return;
+
+ switch (tid_data->state) {
+ case IWL_EMPTYING_HW_QUEUE_ADDBA:
+ IWL_DEBUG_TX_QUEUES(mvm,
+ "Can continue addBA flow ssn = next_recl = %d\n",
+ tid_data->next_reclaimed);
+ tid_data->state = IWL_AGG_STARTING;
+ ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+ break;
+
+ case IWL_EMPTYING_HW_QUEUE_DELBA:
+ IWL_DEBUG_TX_QUEUES(mvm,
+ "Can continue DELBA flow ssn = next_recl = %d\n",
+ tid_data->next_reclaimed);
+ iwl_mvm_disable_txq(mvm, tid_data->txq_id, CMD_ASYNC);
+ tid_data->state = IWL_AGG_OFF;
+ /*
+ * we can't hold the mutex - but since we are after a sequence
+ * point (call to iwl_mvm_disable_txq(), so we don't even need
+ * a memory barrier.
+ */
+ mvm->queue_to_mac80211[tid_data->txq_id] =
+ IWL_INVALID_MAC80211_QUEUE;
+ ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+ break;
+
+ default:
+ break;
+ }
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+const char *iwl_mvm_get_tx_fail_reason(u32 status)
+{
+#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
+#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
+
+ switch (status & TX_STATUS_MSK) {
+ case TX_STATUS_SUCCESS:
+ return "SUCCESS";
+ TX_STATUS_POSTPONE(DELAY);
+ TX_STATUS_POSTPONE(FEW_BYTES);
+ TX_STATUS_POSTPONE(BT_PRIO);
+ TX_STATUS_POSTPONE(QUIET_PERIOD);
+ TX_STATUS_POSTPONE(CALC_TTAK);
+ TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
+ TX_STATUS_FAIL(SHORT_LIMIT);
+ TX_STATUS_FAIL(LONG_LIMIT);
+ TX_STATUS_FAIL(UNDERRUN);
+ TX_STATUS_FAIL(DRAIN_FLOW);
+ TX_STATUS_FAIL(RFKILL_FLUSH);
+ TX_STATUS_FAIL(LIFE_EXPIRE);
+ TX_STATUS_FAIL(DEST_PS);
+ TX_STATUS_FAIL(HOST_ABORTED);
+ TX_STATUS_FAIL(BT_RETRY);
+ TX_STATUS_FAIL(STA_INVALID);
+ TX_STATUS_FAIL(FRAG_DROPPED);
+ TX_STATUS_FAIL(TID_DISABLE);
+ TX_STATUS_FAIL(FIFO_FLUSHED);
+ TX_STATUS_FAIL(SMALL_CF_POLL);
+ TX_STATUS_FAIL(FW_DROP);
+ TX_STATUS_FAIL(STA_COLOR_MISMATCH);
+ }
+
+ return "UNKNOWN";
+
+#undef TX_STATUS_FAIL
+#undef TX_STATUS_POSTPONE
+}
+#endif /* CONFIG_IWLWIFI_DEBUG */
+
+void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
+ enum ieee80211_band band,
+ struct ieee80211_tx_rate *r)
+{
+ if (rate_n_flags & RATE_HT_MCS_GF_MSK)
+ r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
+ switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
+ case RATE_MCS_CHAN_WIDTH_20:
+ break;
+ case RATE_MCS_CHAN_WIDTH_40:
+ r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+ break;
+ case RATE_MCS_CHAN_WIDTH_80:
+ r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
+ break;
+ case RATE_MCS_CHAN_WIDTH_160:
+ r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
+ break;
+ }
+ if (rate_n_flags & RATE_MCS_SGI_MSK)
+ r->flags |= IEEE80211_TX_RC_SHORT_GI;
+ if (rate_n_flags & RATE_MCS_HT_MSK) {
+ r->flags |= IEEE80211_TX_RC_MCS;
+ r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
+ } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
+ ieee80211_rate_set_vht(
+ r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
+ ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
+ RATE_VHT_MCS_NSS_POS) + 1);
+ r->flags |= IEEE80211_TX_RC_VHT_MCS;
+ } else {
+ r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
+ band);
+ }
+}
+
+/**
+ * translate ucode response to mac80211 tx status control values
+ */
+static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
+ struct ieee80211_tx_info *info)
+{
+ struct ieee80211_tx_rate *r = &info->status.rates[0];
+
+ info->status.antenna =
+ ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
+ iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
+}
+
+static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
+ struct iwl_rx_packet *pkt)
+{
+ struct ieee80211_sta *sta;
+ u16 sequence = le16_to_cpu(pkt->hdr.sequence);
+ int txq_id = SEQ_TO_QUEUE(sequence);
+ struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
+ int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
+ int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
+ u32 status = le16_to_cpu(tx_resp->status.status);
+ u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
+ struct iwl_mvm_sta *mvmsta;
+ struct sk_buff_head skbs;
+ u8 skb_freed = 0;
+ u16 next_reclaimed, seq_ctl;
+
+ __skb_queue_head_init(&skbs);
+
+ seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
+
+ /* we can free until ssn % q.n_bd not inclusive */
+ iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
+
+ while (!skb_queue_empty(&skbs)) {
+ struct sk_buff *skb = __skb_dequeue(&skbs);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+ skb_freed++;
+
+ iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
+
+ memset(&info->status, 0, sizeof(info->status));
+
+ info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+
+ /* inform mac80211 about what happened with the frame */
+ switch (status & TX_STATUS_MSK) {
+ case TX_STATUS_SUCCESS:
+ case TX_STATUS_DIRECT_DONE:
+ info->flags |= IEEE80211_TX_STAT_ACK;
+ break;
+ case TX_STATUS_FAIL_DEST_PS:
+ info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
+ break;
+ default:
+ break;
+ }
+
+ info->status.rates[0].count = tx_resp->failure_frame + 1;
+ iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
+ info);
+ info->status.status_driver_data[1] =
+ (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
+
+ /* Single frame failure in an AMPDU queue => send BAR */
+ if (txq_id >= mvm->first_agg_queue &&
+ !(info->flags & IEEE80211_TX_STAT_ACK) &&
+ !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
+ info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
+
+ /* W/A FW bug: seq_ctl is wrong when the status isn't success */
+ if (status != TX_STATUS_SUCCESS) {
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ seq_ctl = le16_to_cpu(hdr->seq_ctrl);
+ }
+
+ /*
+ * TODO: this is not accurate if we are freeing more than one
+ * packet.
+ */
+ info->status.tx_time =
+ le16_to_cpu(tx_resp->wireless_media_time);
+ BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
+ info->status.status_driver_data[0] =
+ (void *)(uintptr_t)tx_resp->reduced_tpc;
+
+ ieee80211_tx_status(mvm->hw, skb);
+ }
+
+ if (txq_id >= mvm->first_agg_queue) {
+ /* If this is an aggregation queue, we use the ssn since:
+ * ssn = wifi seq_num % 256.
+ * The seq_ctl is the sequence control of the packet to which
+ * this Tx response relates. But if there is a hole in the
+ * bitmap of the BA we received, this Tx response may allow to
+ * reclaim the hole and all the subsequent packets that were
+ * already acked. In that case, seq_ctl != ssn, and the next
+ * packet to be reclaimed will be ssn and not seq_ctl. In that
+ * case, several packets will be reclaimed even if
+ * frame_count = 1.
+ *
+ * The ssn is the index (% 256) of the latest packet that has
+ * treated (acked / dropped) + 1.
+ */
+ next_reclaimed = ssn;
+ } else {
+ /* The next packet to be reclaimed is the one after this one */
+ next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
+ }
+
+ IWL_DEBUG_TX_REPLY(mvm,
+ "TXQ %d status %s (0x%08x)\n",
+ txq_id, iwl_mvm_get_tx_fail_reason(status), status);
+
+ IWL_DEBUG_TX_REPLY(mvm,
+ "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
+ le32_to_cpu(tx_resp->initial_rate),
+ tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
+ ssn, next_reclaimed, seq_ctl);
+
+ rcu_read_lock();
+
+ sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
+ /*
+ * sta can't be NULL otherwise it'd mean that the sta has been freed in
+ * the firmware while we still have packets for it in the Tx queues.
+ */
+ if (WARN_ON_ONCE(!sta))
+ goto out;
+
+ if (!IS_ERR(sta)) {
+ mvmsta = iwl_mvm_sta_from_mac80211(sta);
+
+ if (tid != IWL_TID_NON_QOS) {
+ struct iwl_mvm_tid_data *tid_data =
+ &mvmsta->tid_data[tid];
+
+ spin_lock_bh(&mvmsta->lock);
+ tid_data->next_reclaimed = next_reclaimed;
+ IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
+ next_reclaimed);
+ iwl_mvm_check_ratid_empty(mvm, sta, tid);
+ spin_unlock_bh(&mvmsta->lock);
+ }
+
+ if (mvmsta->next_status_eosp) {
+ mvmsta->next_status_eosp = false;
+ ieee80211_sta_eosp(sta);
+ }
+ } else {
+ mvmsta = NULL;
+ }
+
+ /*
+ * If the txq is not an AMPDU queue, there is no chance we freed
+ * several skbs. Check that out...
+ */
+ if (txq_id >= mvm->first_agg_queue)
+ goto out;
+
+ /* We can't free more than one frame at once on a shared queue */
+ WARN_ON(skb_freed > 1);
+
+ /* If we have still frames for this STA nothing to do here */
+ if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
+ goto out;
+
+ if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
+
+ /*
+ * If there are no pending frames for this STA and
+ * the tx to this station is not disabled, notify
+ * mac80211 that this station can now wake up in its
+ * STA table.
+ * If mvmsta is not NULL, sta is valid.
+ */
+
+ spin_lock_bh(&mvmsta->lock);
+
+ if (!mvmsta->disable_tx)
+ ieee80211_sta_block_awake(mvm->hw, sta, false);
+
+ spin_unlock_bh(&mvmsta->lock);
+ }
+
+ if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
+ /*
+ * We are draining and this was the last packet - pre_rcu_remove
+ * has been called already. We might be after the
+ * synchronize_net already.
+ * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
+ */
+ set_bit(sta_id, mvm->sta_drained);
+ schedule_work(&mvm->sta_drained_wk);
+ }
+
+out:
+ rcu_read_unlock();
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
+static const char *iwl_get_agg_tx_status(u16 status)
+{
+ switch (status & AGG_TX_STATE_STATUS_MSK) {
+ AGG_TX_STATE_(TRANSMITTED);
+ AGG_TX_STATE_(UNDERRUN);
+ AGG_TX_STATE_(BT_PRIO);
+ AGG_TX_STATE_(FEW_BYTES);
+ AGG_TX_STATE_(ABORT);
+ AGG_TX_STATE_(LAST_SENT_TTL);
+ AGG_TX_STATE_(LAST_SENT_TRY_CNT);
+ AGG_TX_STATE_(LAST_SENT_BT_KILL);
+ AGG_TX_STATE_(SCD_QUERY);
+ AGG_TX_STATE_(TEST_BAD_CRC32);
+ AGG_TX_STATE_(RESPONSE);
+ AGG_TX_STATE_(DUMP_TX);
+ AGG_TX_STATE_(DELAY_TX);
+ }
+
+ return "UNKNOWN";
+}
+
+static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
+ struct iwl_rx_packet *pkt)
+{
+ struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
+ struct agg_tx_status *frame_status = &tx_resp->status;
+ int i;
+
+ for (i = 0; i < tx_resp->frame_count; i++) {
+ u16 fstatus = le16_to_cpu(frame_status[i].status);
+
+ IWL_DEBUG_TX_REPLY(mvm,
+ "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
+ iwl_get_agg_tx_status(fstatus),
+ fstatus & AGG_TX_STATE_STATUS_MSK,
+ (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
+ AGG_TX_STATE_TRY_CNT_POS,
+ le16_to_cpu(frame_status[i].sequence));
+ }
+}
+#else
+static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
+ struct iwl_rx_packet *pkt)
+{}
+#endif /* CONFIG_IWLWIFI_DEBUG */
+
+static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
+ struct iwl_rx_packet *pkt)
+{
+ struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
+ int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
+ int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
+ u16 sequence = le16_to_cpu(pkt->hdr.sequence);
+ struct ieee80211_sta *sta;
+
+ if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
+ return;
+
+ if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
+ return;
+
+ iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
+
+ rcu_read_lock();
+
+ sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
+
+ if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
+ struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
+ mvmsta->tid_data[tid].rate_n_flags =
+ le32_to_cpu(tx_resp->initial_rate);
+ mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
+ mvmsta->tid_data[tid].tx_time =
+ le16_to_cpu(tx_resp->wireless_media_time);
+ }
+
+ rcu_read_unlock();
+}
+
+int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
+ struct iwl_device_cmd *cmd)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
+
+ if (tx_resp->frame_count == 1)
+ iwl_mvm_rx_tx_cmd_single(mvm, pkt);
+ else
+ iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
+
+ return 0;
+}
+
+static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
+ struct iwl_mvm_ba_notif *ba_notif,
+ struct iwl_mvm_tid_data *tid_data)
+{
+ info->flags |= IEEE80211_TX_STAT_AMPDU;
+ info->status.ampdu_ack_len = ba_notif->txed_2_done;
+ info->status.ampdu_len = ba_notif->txed;
+ iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
+ info);
+ /* TODO: not accounted if the whole A-MPDU failed */
+ info->status.tx_time = tid_data->tx_time;
+ info->status.status_driver_data[0] =
+ (void *)(uintptr_t)tid_data->reduced_tpc;
+ info->status.status_driver_data[1] =
+ (void *)(uintptr_t)tid_data->rate_n_flags;
+}
+
+int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
+ struct iwl_device_cmd *cmd)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
+ struct sk_buff_head reclaimed_skbs;
+ struct iwl_mvm_tid_data *tid_data;
+ struct ieee80211_sta *sta;
+ struct iwl_mvm_sta *mvmsta;
+ struct sk_buff *skb;
+ int sta_id, tid, freed;
+ /* "flow" corresponds to Tx queue */
+ u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
+ /* "ssn" is start of block-ack Tx window, corresponds to index
+ * (in Tx queue's circular buffer) of first TFD/frame in window */
+ u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
+
+ sta_id = ba_notif->sta_id;
+ tid = ba_notif->tid;
+
+ if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
+ tid >= IWL_MAX_TID_COUNT,
+ "sta_id %d tid %d", sta_id, tid))
+ return 0;
+
+ rcu_read_lock();
+
+ sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
+
+ /* Reclaiming frames for a station that has been deleted ? */
+ if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
+ rcu_read_unlock();
+ return 0;
+ }
+
+ mvmsta = iwl_mvm_sta_from_mac80211(sta);
+ tid_data = &mvmsta->tid_data[tid];
+
+ if (tid_data->txq_id != scd_flow) {
+ IWL_ERR(mvm,
+ "invalid BA notification: Q %d, tid %d, flow %d\n",
+ tid_data->txq_id, tid, scd_flow);
+ rcu_read_unlock();
+ return 0;
+ }
+
+ spin_lock_bh(&mvmsta->lock);
+
+ __skb_queue_head_init(&reclaimed_skbs);
+
+ /*
+ * Release all TFDs before the SSN, i.e. all TFDs in front of
+ * block-ack window (we assume that they've been successfully
+ * transmitted ... if not, it's too late anyway).
+ */
+ iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
+ &reclaimed_skbs);
+
+ IWL_DEBUG_TX_REPLY(mvm,
+ "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
+ (u8 *)&ba_notif->sta_addr_lo32,
+ ba_notif->sta_id);
+ IWL_DEBUG_TX_REPLY(mvm,
+ "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
+ ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
+ (unsigned long long)le64_to_cpu(ba_notif->bitmap),
+ scd_flow, ba_resp_scd_ssn, ba_notif->txed,
+ ba_notif->txed_2_done);
+
+ tid_data->next_reclaimed = ba_resp_scd_ssn;
+
+ iwl_mvm_check_ratid_empty(mvm, sta, tid);
+
+ freed = 0;
+
+ skb_queue_walk(&reclaimed_skbs, skb) {
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+ if (ieee80211_is_data_qos(hdr->frame_control))
+ freed++;
+ else
+ WARN_ON_ONCE(1);
+
+ iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
+
+ memset(&info->status, 0, sizeof(info->status));
+ /* Packet was transmitted successfully, failures come as single
+ * frames because before failing a frame the firmware transmits
+ * it without aggregation at least once.
+ */
+ info->flags |= IEEE80211_TX_STAT_ACK;
+
+ /* this is the first skb we deliver in this batch */
+ /* put the rate scaling data there */
+ if (freed == 1)
+ iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
+ }
+
+ spin_unlock_bh(&mvmsta->lock);
+
+ /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
+ * possible (i.e. first MPDU in the aggregation wasn't acked)
+ * Still it's important to update RS about sent vs. acked.
+ */
+ if (skb_queue_empty(&reclaimed_skbs)) {
+ struct ieee80211_tx_info ba_info = {};
+ struct ieee80211_chanctx_conf *chanctx_conf = NULL;
+
+ if (mvmsta->vif)
+ chanctx_conf =
+ rcu_dereference(mvmsta->vif->chanctx_conf);
+
+ if (WARN_ON_ONCE(!chanctx_conf))
+ goto out;
+
+ ba_info.band = chanctx_conf->def.chan->band;
+ iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
+
+ IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
+ iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
+ }
+
+out:
+ rcu_read_unlock();
+
+ while (!skb_queue_empty(&reclaimed_skbs)) {
+ skb = __skb_dequeue(&reclaimed_skbs);
+ ieee80211_tx_status(mvm->hw, skb);
+ }
+
+ return 0;
+}
+
+/*
+ * Note that there are transports that buffer frames before they reach
+ * the firmware. This means that after flush_tx_path is called, the
+ * queue might not be empty. The race-free way to handle this is to:
+ * 1) set the station as draining
+ * 2) flush the Tx path
+ * 3) wait for the transport queues to be empty
+ */
+int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
+{
+ int ret;
+ struct iwl_tx_path_flush_cmd flush_cmd = {
+ .queues_ctl = cpu_to_le32(tfd_msk),
+ .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
+ };
+
+ u32 flags = sync ? 0 : CMD_ASYNC;
+
+ ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
+ sizeof(flush_cmd), &flush_cmd);
+ if (ret)
+ IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff