diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/tx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/tx.c | 1115 |
1 files changed, 0 insertions, 1115 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c deleted file mode 100644 index c652a66be803..000000000000 --- a/drivers/net/wireless/iwlwifi/mvm/tx.c +++ /dev/null @@ -1,1115 +0,0 @@ -/****************************************************************************** - * - * 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; -} |