+++ /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 - 2015 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 - 2015 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"
-
-static void
-iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
- u16 tid, u16 ssn)
-{
- struct iwl_fw_dbg_trigger_tlv *trig;
- struct iwl_fw_dbg_trigger_ba *ba_trig;
-
- if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
- return;
-
- trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
- ba_trig = (void *)trig->data;
-
- if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
- return;
-
- if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
- return;
-
- iwl_mvm_fw_dbg_collect_trig(mvm, trig,
- "BAR sent to %pM, tid %d, ssn %d",
- addr, tid, ssn);
-}
-
-/*
- * 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);
- u16 ssn = le16_to_cpu(bar->start_seq_num);
-
- 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);
- iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
- ssn);
- } 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(PM_FRAME_ASSOC);
- else if (ieee80211_is_action(fc))
- tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
- else
- tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
-
- /* 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(PM_FRAME_MGMT);
- } else {
- tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
- }
-
- 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 (fw_has_capa(&mvm->fw->ucode_capa,
- 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 = 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
- */
-static 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,
- int hdrlen)
-{
- struct ieee80211_key_conf *keyconf = info->control.hw_key;
- u8 *crypto_hdr = skb_frag->data + hdrlen;
- u64 pn;
-
- switch (keyconf->cipher) {
- case WLAN_CIPHER_SUITE_CCMP:
- case WLAN_CIPHER_SUITE_CCMP_256:
- iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
- pn = atomic64_inc_return(&keyconf->tx_pn);
- crypto_hdr[0] = pn;
- crypto_hdr[2] = 0;
- crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
- crypto_hdr[1] = pn >> 8;
- crypto_hdr[4] = pn >> 16;
- crypto_hdr[5] = pn >> 24;
- crypto_hdr[6] = pn >> 32;
- crypto_hdr[7] = pn >> 40;
- 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,
- int hdrlen, 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, hdrlen);
-
- 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;
- int hdrlen = ieee80211_hdrlen(hdr->frame_control);
-
- 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 the frame is sent is the P2P_DEVICE
- * or an AP/GO interface use the broadcast station associated
- * with it; otherwise if the interface is a managed interface
- * use the AP station associated with it for multicast traffic
- * (this is not possible for unicast packets as a TLDS discovery
- * response are sent without a station entry); otherwise use the
- * AUX station.
- */
- sta_id = mvm->aux_sta.sta_id;
- if (info->control.vif) {
- struct iwl_mvm_vif *mvmvif =
- iwl_mvm_vif_from_mac80211(info->control.vif);
-
- if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
- info->control.vif->type == NL80211_IFTYPE_AP)
- sta_id = mvmvif->bcast_sta.sta_id;
- else if (info->control.vif->type == NL80211_IFTYPE_STATION &&
- is_multicast_ether_addr(hdr->addr1)) {
- u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
-
- if (ap_sta_id != IWL_MVM_STATION_COUNT)
- sta_id = ap_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, hdrlen, 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, hdrlen);
-
- 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;
- int hdrlen;
-
- mvmsta = iwl_mvm_sta_from_mac80211(sta);
- fc = hdr->frame_control;
- hdrlen = ieee80211_hdrlen(fc);
-
- 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, hdrlen, 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, hdrlen);
-
- 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,
- vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
- CMD_ASYNC);
- tid_data->state = IWL_AGG_OFF;
- 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();
-}
-
-void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
-{
- 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);
-}
-
-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;
-}
-
-void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
-{
- 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;
-
- 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;
- }
-
- 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;
- }
-
- 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);
- }
-}
-
-/*
- * 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, u32 flags)
-{
- 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),
- };
-
- 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;
-}
projects / cascardo / linux.git / blobdiff