| /****************************************************************************** |
| * |
| * 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 - 2013 Intel Corporation. All rights reserved. |
| * |
| * 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 - 2013 Intel Corporation. All rights reserved. |
| * 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 |
| */ |
| static 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; |
| |
| 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; |
| else if (ieee80211_is_back_req(fc)) |
| tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; |
| |
| /* High prio packet (wrt. BT coex) if it is EAPOL, MCAST or MGMT */ |
| if (info->band == IEEE80211_BAND_2GHZ && |
| (skb->protocol == cpu_to_be16(ETH_P_PAE) || |
| is_multicast_ether_addr(hdr->addr1) || |
| ieee80211_is_back_req(fc) || |
| ieee80211_is_mgmt(fc))) |
| tx_flags |= TX_CMD_FLG_BT_DIS; |
| |
| 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 { |
| 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; |
| } |
| |
| 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 (skb->protocol == cpu_to_be16(ETH_P_PAE)) { |
| tx_cmd->pm_frame_timeout = cpu_to_le16(2); |
| } else { |
| tx_cmd->pm_frame_timeout = 0; |
| } |
| |
| if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| tx_flags |= TX_CMD_FLG_PROT_REQUIRE; |
| |
| if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
| !is_multicast_ether_addr(ieee80211_get_DA(hdr))) |
| tx_flags |= TX_CMD_FLG_PROT_REQUIRE; |
| |
| tx_cmd->driver_txop = 0; |
| 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 |
| */ |
| static 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 he 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 for a non data frame 0x%x\n", |
| info->control.rates[0].flags); |
| |
| 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_fw_valid_tx_ant(mvm->fw), |
| mvm->mgmt_last_antenna_idx); |
| 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) |
| { |
| 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: |
| IWL_ERR(mvm, "Unknown encode cipher %x\n", keyconf->cipher); |
| break; |
| } |
| } |
| |
| /* |
| * 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)); |
| 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; |
| |
| /* |
| * 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 = (void *)sta->drv_priv; |
| 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 */ |
| |
| 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); |
| seq_number += 0x10; |
| 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 (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, 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; |
| |
| spin_unlock(&mvmsta->lock); |
| |
| if (txq_id < IWL_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 = (void *)sta->drv_priv; |
| 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->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_trans_txq_disable(mvm->trans, tid_data->txq_id); |
| tid_data->state = IWL_AGG_OFF; |
| /* |
| * we can't hold the mutex - but since we are after a sequence |
| * point (call to iwl_trans_txq_disable), 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 */ |
| |
| /** |
| * translate ucode response to mac80211 tx status control values |
| */ |
| static void iwl_mvm_hwrate_to_tx_control(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); |
| 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, |
| info->band); |
| } |
| } |
| |
| 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_control(le32_to_cpu(tx_resp->initial_rate), |
| info); |
| |
| /* Single frame failure in an AMPDU queue => send BAR */ |
| if (txq_id >= IWL_MVM_FIRST_AGG_QUEUE && |
| !(info->flags & IEEE80211_TX_STAT_ACK)) |
| 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); |
| } |
| |
| ieee80211_tx_status_ni(mvm->hw, skb); |
| } |
| |
| if (txq_id >= IWL_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]); |
| |
| if (!IS_ERR_OR_NULL(sta)) { |
| mvmsta = (void *)sta->drv_priv; |
| |
| 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); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| mvmsta->last_seq_ctl = seq_ctl; |
| #endif |
| } else { |
| sta = NULL; |
| mvmsta = NULL; |
| } |
| |
| /* |
| * If the txq is not an AMPDU queue, there is no chance we freed |
| * several skbs. Check that out... |
| */ |
| if (txq_id < IWL_MVM_FIRST_AGG_QUEUE && !WARN_ON(skb_freed > 1) && |
| atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) { |
| if (mvmsta) { |
| /* |
| * If there are no pending frames for this STA, notify |
| * mac80211 that this station can go to sleep in its |
| * STA table. |
| */ |
| if (mvmsta->vif->type == NL80211_IFTYPE_AP) |
| ieee80211_sta_block_awake(mvm->hw, sta, false); |
| /* |
| * We might very well have taken mvmsta pointer while |
| * the station was being removed. The remove flow might |
| * have seen a pending_frame (because we didn't take |
| * the lock) even if now the queues are drained. So make |
| * really sure now that this the station is not being |
| * removed. If it is, run the drain worker to remove it. |
| */ |
| spin_lock_bh(&mvmsta->lock); |
| sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |
| if (IS_ERR_OR_NULL(sta)) { |
| /* |
| * Station disappeared in the meantime: |
| * so we are draining. |
| */ |
| set_bit(sta_id, mvm->sta_drained); |
| schedule_work(&mvm->sta_drained_wk); |
| } |
| spin_unlock_bh(&mvmsta->lock); |
| } else if (!mvmsta) { |
| /* Tx response without STA, so we are draining */ |
| set_bit(sta_id, mvm->sta_drained); |
| schedule_work(&mvm->sta_drained_wk); |
| } |
| } |
| |
| 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) < IWL_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 = (void *)sta->drv_priv; |
| mvmsta->tid_data[tid].rate_n_flags = |
| le32_to_cpu(tx_resp->initial_rate); |
| } |
| |
| 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; |
| } |
| |
| 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_tx_info *info; |
| struct ieee80211_sta *sta; |
| struct iwl_mvm_sta *mvmsta; |
| struct ieee80211_hdr *hdr; |
| 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; |
| |
| 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 = (void *)sta->drv_priv; |
| tid_data = &mvmsta->tid_data[tid]; |
| |
| if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d", |
| 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) { |
| hdr = (struct ieee80211_hdr *)skb->data; |
| |
| if (ieee80211_is_data_qos(hdr->frame_control)) |
| freed++; |
| else |
| WARN_ON_ONCE(1); |
| |
| info = IEEE80211_SKB_CB(skb); |
| iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
| |
| if (freed == 1) { |
| /* this is the first skb we deliver in this batch */ |
| /* put the rate scaling data there */ |
| info = IEEE80211_SKB_CB(skb); |
| memset(&info->status, 0, sizeof(info->status)); |
| info->flags |= IEEE80211_TX_STAT_ACK; |
| 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_control(tid_data->rate_n_flags, |
| info); |
| } |
| } |
| |
| spin_unlock_bh(&mvmsta->lock); |
| |
| rcu_read_unlock(); |
| |
| while (!skb_queue_empty(&reclaimed_skbs)) { |
| skb = __skb_dequeue(&reclaimed_skbs); |
| ieee80211_tx_status_ni(mvm->hw, skb); |
| } |
| |
| return 0; |
| } |
| |
| 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 ? CMD_SYNC : 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; |
| } |