| /****************************************************************************** |
| * |
| * 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 |
| * Copyright(c) 2016 Intel Deutschland 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 <linuxwifi@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 <linux/tcp.h> |
| #include <net/ip.h> |
| #include <net/ipv6.h> |
| |
| #include "iwl-trans.h" |
| #include "iwl-eeprom-parse.h" |
| #include "mvm.h" |
| #include "sta.h" |
| #include "fw-dbg.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); |
| } |
| |
| #define OPT_HDR(type, skb, off) \ |
| (type *)(skb_network_header(skb) + (off)) |
| |
| static void iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, |
| struct ieee80211_hdr *hdr, |
| struct ieee80211_tx_info *info, |
| struct iwl_tx_cmd *tx_cmd) |
| { |
| #if IS_ENABLED(CONFIG_INET) |
| u16 mh_len = ieee80211_hdrlen(hdr->frame_control); |
| u16 offload_assist = le16_to_cpu(tx_cmd->offload_assist); |
| u8 protocol = 0; |
| |
| /* |
| * Do not compute checksum if already computed or if transport will |
| * compute it |
| */ |
| if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) |
| return; |
| |
| /* We do not expect to be requested to csum stuff we do not support */ |
| if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || |
| (skb->protocol != htons(ETH_P_IP) && |
| skb->protocol != htons(ETH_P_IPV6)), |
| "No support for requested checksum\n")) { |
| skb_checksum_help(skb); |
| return; |
| } |
| |
| if (skb->protocol == htons(ETH_P_IP)) { |
| protocol = ip_hdr(skb)->protocol; |
| } else { |
| #if IS_ENABLED(CONFIG_IPV6) |
| struct ipv6hdr *ipv6h = |
| (struct ipv6hdr *)skb_network_header(skb); |
| unsigned int off = sizeof(*ipv6h); |
| |
| protocol = ipv6h->nexthdr; |
| while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { |
| struct ipv6_opt_hdr *hp; |
| |
| /* only supported extension headers */ |
| if (protocol != NEXTHDR_ROUTING && |
| protocol != NEXTHDR_HOP && |
| protocol != NEXTHDR_DEST) { |
| skb_checksum_help(skb); |
| return; |
| } |
| |
| hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); |
| protocol = hp->nexthdr; |
| off += ipv6_optlen(hp); |
| } |
| /* if we get here - protocol now should be TCP/UDP */ |
| #endif |
| } |
| |
| if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { |
| WARN_ON_ONCE(1); |
| skb_checksum_help(skb); |
| return; |
| } |
| |
| /* enable L4 csum */ |
| offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); |
| |
| /* |
| * Set offset to IP header (snap). |
| * We don't support tunneling so no need to take care of inner header. |
| * Size is in words. |
| */ |
| offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); |
| |
| /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ |
| if (skb->protocol == htons(ETH_P_IP) && |
| (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { |
| ip_hdr(skb)->check = 0; |
| offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); |
| } |
| |
| /* reset UDP/TCP header csum */ |
| if (protocol == IPPROTO_TCP) |
| tcp_hdr(skb)->check = 0; |
| else |
| udp_hdr(skb)->check = 0; |
| |
| /* mac header len should include IV, size is in words */ |
| if (info->control.hw_key) |
| mh_len += info->control.hw_key->iv_len; |
| mh_len /= 2; |
| offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; |
| |
| tx_cmd->offload_assist = cpu_to_le16(offload_assist); |
| #endif |
| } |
| |
| /* |
| * 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_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
| 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; |
| if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
| tx_cmd->offload_assist |= |
| cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)); |
| } 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 + |
| (uintptr_t)skb_info->driver_data[0]); |
| tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); |
| tx_cmd->sta_id = sta_id; |
| |
| /* padding is inserted later in transport */ |
| if (ieee80211_hdrlen(fc) % 4 && |
| !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)))) |
| tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD)); |
| |
| iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd); |
| } |
| |
| /* |
| * 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 == NL80211_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 == NL80211_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); |
| } |
| |
| static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, |
| u8 *crypto_hdr) |
| { |
| struct ieee80211_key_conf *keyconf = info->control.hw_key; |
| u64 pn; |
| |
| 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; |
| } |
| |
| /* |
| * 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); |
| iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); |
| break; |
| |
| case WLAN_CIPHER_SUITE_TKIP: |
| tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
| pn = atomic64_inc_return(&keyconf->tx_pn); |
| ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); |
| 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; |
| case WLAN_CIPHER_SUITE_GCMP: |
| case WLAN_CIPHER_SUITE_GCMP_256: |
| /* TODO: Taking the key from the table might introduce a race |
| * when PTK rekeying is done, having an old packets with a PN |
| * based on the old key but the message encrypted with a new |
| * one. |
| * Need to handle this. |
| */ |
| tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TC_CMD_SEC_KEY_FROM_TABLE; |
| tx_cmd->key[0] = keyconf->hw_key_idx; |
| iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); |
| break; |
| default: |
| tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
| } |
| } |
| |
| /* |
| * Allocates and sets the Tx cmd the driver data pointers in the skb |
| */ |
| static struct iwl_device_cmd * |
| iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, |
| struct ieee80211_tx_info *info, int hdrlen, |
| struct ieee80211_sta *sta, u8 sta_id) |
| { |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| struct ieee80211_tx_info *skb_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(&skb_info->status, 0, sizeof(skb_info->status)); |
| memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); |
| |
| skb_info->driver_data[1] = dev_cmd; |
| |
| return dev_cmd; |
| } |
| |
| static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, |
| struct ieee80211_tx_info *info, __le16 fc) |
| { |
| if (iwl_mvm_is_dqa_supported(mvm)) { |
| if (info->control.vif->type == NL80211_IFTYPE_AP && |
| ieee80211_is_probe_resp(fc)) |
| return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; |
| else if (ieee80211_is_mgmt(fc) && |
| info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE) |
| return IWL_MVM_DQA_P2P_DEVICE_QUEUE; |
| } |
| |
| return info->hw_queue; |
| } |
| |
| 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 *skb_info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_tx_info info; |
| struct iwl_device_cmd *dev_cmd; |
| struct iwl_tx_cmd *tx_cmd; |
| u8 sta_id; |
| int hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| int queue; |
| |
| /* 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 && |
| skb_info->control.vif->type == NL80211_IFTYPE_STATION) |
| IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; |
| |
| memcpy(&info, skb->cb, sizeof(info)); |
| |
| 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; |
| |
| /* This holds the amsdu headers length */ |
| skb_info->driver_data[0] = (void *)(uintptr_t)0; |
| |
| queue = info.hw_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. |
| * In DQA mode, if vif is of type STATION and frames are not multicast, |
| * they should be sent from the BSS queue. For example, TDLS setup |
| * frames should be sent on this queue, as they go through the AP. |
| */ |
| 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; |
| queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, |
| hdr->frame_control); |
| } 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; |
| } else if (iwl_mvm_is_dqa_supported(mvm) && |
| info.control.vif->type == NL80211_IFTYPE_STATION) { |
| queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; |
| } |
| } |
| |
| IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); |
| |
| dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); |
| if (!dev_cmd) |
| return -1; |
| |
| 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, queue)) { |
| iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); |
| return -1; |
| } |
| |
| /* |
| * Increase the pending frames counter, so that later when a reply comes |
| * in and the counter is decreased - we don't start getting negative |
| * values. |
| * Note that we don't need to make sure it isn't agg'd, since we're |
| * TXing non-sta |
| */ |
| atomic_inc(&mvm->pending_frames[sta_id]); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_INET |
| static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, |
| struct ieee80211_tx_info *info, |
| struct ieee80211_sta *sta, |
| struct sk_buff_head *mpdus_skb) |
| { |
| struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
| struct ieee80211_hdr *hdr = (void *)skb->data; |
| unsigned int mss = skb_shinfo(skb)->gso_size; |
| struct sk_buff *tmp, *next; |
| char cb[sizeof(skb->cb)]; |
| unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; |
| bool ipv4 = (skb->protocol == htons(ETH_P_IP)); |
| u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; |
| u16 amsdu_add, snap_ip_tcp, pad, i = 0; |
| unsigned int dbg_max_amsdu_len; |
| netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; |
| u8 *qc, tid, txf; |
| |
| snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + |
| tcp_hdrlen(skb); |
| |
| qc = ieee80211_get_qos_ctl(hdr); |
| tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
| if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) |
| return -EINVAL; |
| |
| dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); |
| |
| if (!sta->max_amsdu_len || |
| !ieee80211_is_data_qos(hdr->frame_control) || |
| (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { |
| num_subframes = 1; |
| pad = 0; |
| goto segment; |
| } |
| |
| /* |
| * Do not build AMSDU for IPv6 with extension headers. |
| * ask stack to segment and checkum the generated MPDUs for us. |
| */ |
| if (skb->protocol == htons(ETH_P_IPV6) && |
| ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != |
| IPPROTO_TCP) { |
| num_subframes = 1; |
| pad = 0; |
| netdev_features &= ~NETIF_F_CSUM_MASK; |
| goto segment; |
| } |
| |
| /* |
| * No need to lock amsdu_in_ampdu_allowed since it can't be modified |
| * during an BA session. |
| */ |
| if (info->flags & IEEE80211_TX_CTL_AMPDU && |
| !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { |
| num_subframes = 1; |
| pad = 0; |
| goto segment; |
| } |
| |
| max_amsdu_len = sta->max_amsdu_len; |
| |
| /* the Tx FIFO to which this A-MSDU will be routed */ |
| txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; |
| |
| /* |
| * Don't send an AMSDU that will be longer than the TXF. |
| * Add a security margin of 256 for the TX command + headers. |
| * We also want to have the start of the next packet inside the |
| * fifo to be able to send bursts. |
| */ |
| max_amsdu_len = min_t(unsigned int, max_amsdu_len, |
| mvm->shared_mem_cfg.txfifo_size[txf] - 256); |
| |
| if (unlikely(dbg_max_amsdu_len)) |
| max_amsdu_len = min_t(unsigned int, max_amsdu_len, |
| dbg_max_amsdu_len); |
| |
| /* |
| * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not |
| * supported. This is a spec requirement (IEEE 802.11-2015 |
| * section 8.7.3 NOTE 3). |
| */ |
| if (info->flags & IEEE80211_TX_CTL_AMPDU && |
| !sta->vht_cap.vht_supported) |
| max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); |
| |
| /* Sub frame header + SNAP + IP header + TCP header + MSS */ |
| subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; |
| pad = (4 - subf_len) & 0x3; |
| |
| /* |
| * If we have N subframes in the A-MSDU, then the A-MSDU's size is |
| * N * subf_len + (N - 1) * pad. |
| */ |
| num_subframes = (max_amsdu_len + pad) / (subf_len + pad); |
| if (num_subframes > 1) |
| *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; |
| |
| tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - |
| tcp_hdrlen(skb) + skb->data_len; |
| |
| /* |
| * Make sure we have enough TBs for the A-MSDU: |
| * 2 for each subframe |
| * 1 more for each fragment |
| * 1 more for the potential data in the header |
| */ |
| num_subframes = |
| min_t(unsigned int, num_subframes, |
| (mvm->trans->max_skb_frags - 1 - |
| skb_shinfo(skb)->nr_frags) / 2); |
| |
| /* This skb fits in one single A-MSDU */ |
| if (num_subframes * mss >= tcp_payload_len) { |
| struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
| |
| /* |
| * Compute the length of all the data added for the A-MSDU. |
| * This will be used to compute the length to write in the TX |
| * command. We have: SNAP + IP + TCP for n -1 subframes and |
| * ETH header for n subframes. Note that the original skb |
| * already had one set of SNAP / IP / TCP headers. |
| */ |
| num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); |
| amsdu_add = num_subframes * sizeof(struct ethhdr) + |
| (num_subframes - 1) * (snap_ip_tcp + pad); |
| /* This holds the amsdu headers length */ |
| skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add; |
| |
| __skb_queue_tail(mpdus_skb, skb); |
| return 0; |
| } |
| |
| /* |
| * Trick the segmentation function to make it |
| * create SKBs that can fit into one A-MSDU. |
| */ |
| segment: |
| skb_shinfo(skb)->gso_size = num_subframes * mss; |
| memcpy(cb, skb->cb, sizeof(cb)); |
| |
| next = skb_gso_segment(skb, netdev_features); |
| skb_shinfo(skb)->gso_size = mss; |
| if (WARN_ON_ONCE(IS_ERR(next))) |
| return -EINVAL; |
| else if (next) |
| consume_skb(skb); |
| |
| while (next) { |
| tmp = next; |
| next = tmp->next; |
| |
| memcpy(tmp->cb, cb, sizeof(tmp->cb)); |
| /* |
| * Compute the length of all the data added for the A-MSDU. |
| * This will be used to compute the length to write in the TX |
| * command. We have: SNAP + IP + TCP for n -1 subframes and |
| * ETH header for n subframes. |
| */ |
| tcp_payload_len = skb_tail_pointer(tmp) - |
| skb_transport_header(tmp) - |
| tcp_hdrlen(tmp) + tmp->data_len; |
| |
| if (ipv4) |
| ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); |
| |
| if (tcp_payload_len > mss) { |
| struct ieee80211_tx_info *skb_info = |
| IEEE80211_SKB_CB(tmp); |
| |
| num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); |
| amsdu_add = num_subframes * sizeof(struct ethhdr) + |
| (num_subframes - 1) * (snap_ip_tcp + pad); |
| skb_info->driver_data[0] = |
| (void *)(uintptr_t)amsdu_add; |
| skb_shinfo(tmp)->gso_size = mss; |
| } else { |
| qc = ieee80211_get_qos_ctl((void *)tmp->data); |
| |
| if (ipv4) |
| ip_send_check(ip_hdr(tmp)); |
| *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; |
| skb_shinfo(tmp)->gso_size = 0; |
| } |
| |
| tmp->prev = NULL; |
| tmp->next = NULL; |
| |
| __skb_queue_tail(mpdus_skb, tmp); |
| i++; |
| } |
| |
| return 0; |
| } |
| #else /* CONFIG_INET */ |
| static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, |
| struct ieee80211_tx_info *info, |
| struct ieee80211_sta *sta, |
| struct sk_buff_head *mpdus_skb) |
| { |
| /* Impossible to get TSO with CONFIG_INET */ |
| WARN_ON(1); |
| |
| return -1; |
| } |
| #endif |
| |
| static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, |
| struct iwl_mvm_sta *mvm_sta, u8 tid, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| u8 mac_queue = info->hw_queue; |
| struct sk_buff_head *deferred_tx_frames; |
| |
| lockdep_assert_held(&mvm_sta->lock); |
| |
| mvm_sta->deferred_traffic_tid_map |= BIT(tid); |
| set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); |
| |
| deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; |
| |
| skb_queue_tail(deferred_tx_frames, skb); |
| |
| /* |
| * The first deferred frame should've stopped the MAC queues, so we |
| * should never get a second deferred frame for the RA/TID. |
| */ |
| if (!WARN(skb_queue_len(deferred_tx_frames) != 1, |
| "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, |
| skb_queue_len(deferred_tx_frames))) { |
| iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); |
| schedule_work(&mvm->add_stream_wk); |
| } |
| } |
| |
| /* |
| * Sets the fields in the Tx cmd that are crypto related |
| */ |
| static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, |
| struct ieee80211_tx_info *info, |
| struct ieee80211_sta *sta) |
| { |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 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_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, info, 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_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; |
| } else if (iwl_mvm_is_dqa_supported(mvm) && |
| (ieee80211_is_qos_nullfunc(fc) || |
| ieee80211_is_nullfunc(fc))) { |
| /* |
| * nullfunc frames should go to the MGMT queue regardless of QOS |
| */ |
| tid = IWL_MAX_TID_COUNT; |
| } |
| |
| if (iwl_mvm_is_dqa_supported(mvm)) |
| txq_id = mvmsta->tid_data[tid].txq_id; |
| |
| /* 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 && !iwl_mvm_is_dqa_supported(mvm)) { |
| /* 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; |
| } |
| |
| /* Check if TXQ needs to be allocated or re-activated */ |
| if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE || |
| !mvmsta->tid_data[tid].is_tid_active) && |
| iwl_mvm_is_dqa_supported(mvm)) { |
| /* If TXQ needs to be allocated... */ |
| if (txq_id == IEEE80211_INVAL_HW_QUEUE) { |
| iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); |
| |
| /* |
| * The frame is now deferred, and the worker scheduled |
| * will re-allocate it, so we can free it for now. |
| */ |
| iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); |
| spin_unlock(&mvmsta->lock); |
| return 0; |
| |
| } |
| |
| /* If we are here - TXQ exists and needs to be re-activated */ |
| spin_lock(&mvm->queue_info_lock); |
| mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; |
| mvmsta->tid_data[tid].is_tid_active = true; |
| spin_unlock(&mvm->queue_info_lock); |
| |
| IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", |
| txq_id); |
| } |
| |
| /* Keep track of the time of the last frame for this RA/TID */ |
| mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; |
| |
| 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 (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) |
| mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
| |
| spin_unlock(&mvmsta->lock); |
| |
| /* Increase pending frames count if this isn't AMPDU */ |
| if (!is_ampdu) |
| 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; |
| } |
| |
| int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, |
| struct ieee80211_sta *sta) |
| { |
| struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
| struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_tx_info info; |
| struct sk_buff_head mpdus_skbs; |
| unsigned int payload_len; |
| int ret; |
| |
| if (WARN_ON_ONCE(!mvmsta)) |
| return -1; |
| |
| if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
| return -1; |
| |
| memcpy(&info, skb->cb, sizeof(info)); |
| |
| /* This holds the amsdu headers length */ |
| skb_info->driver_data[0] = (void *)(uintptr_t)0; |
| |
| if (!skb_is_gso(skb)) |
| return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
| |
| payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - |
| tcp_hdrlen(skb) + skb->data_len; |
| |
| if (payload_len <= skb_shinfo(skb)->gso_size) |
| return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
| |
| __skb_queue_head_init(&mpdus_skbs); |
| |
| ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); |
| if (ret) |
| return ret; |
| |
| if (WARN_ON(skb_queue_empty(&mpdus_skbs))) |
| return ret; |
| |
| while (!skb_queue_empty(&mpdus_skbs)) { |
| skb = __skb_dequeue(&mpdus_skbs); |
| |
| ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
| if (ret) { |
| __skb_queue_purge(&mpdus_skbs); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| 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 nl80211_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_tx_status_check_trigger(struct iwl_mvm *mvm, |
| u32 status) |
| { |
| struct iwl_fw_dbg_trigger_tlv *trig; |
| struct iwl_fw_dbg_trigger_tx_status *status_trig; |
| int i; |
| |
| if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) |
| return; |
| |
| trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); |
| status_trig = (void *)trig->data; |
| |
| if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { |
| /* don't collect on status 0 */ |
| if (!status_trig->statuses[i].status) |
| break; |
| |
| if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) |
| continue; |
| |
| iwl_mvm_fw_dbg_collect_trig(mvm, trig, |
| "Tx status %d was received", |
| status & TX_STATUS_MSK); |
| break; |
| } |
| } |
| |
| 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; |
| bool is_ndp = false; |
| bool txq_agg = false; /* Is this TXQ aggregated */ |
| |
| __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; |
| } |
| |
| iwl_mvm_tx_status_check_trigger(mvm, status); |
| |
| 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); |
| } |
| |
| if (unlikely(!seq_ctl)) { |
| struct ieee80211_hdr *hdr = (void *)skb->data; |
| |
| /* |
| * If it is an NDP, we can't update next_reclaim since |
| * its sequence control is 0. Note that for that same |
| * reason, NDPs are never sent to A-MPDU'able queues |
| * so that we can never have more than one freed frame |
| * for a single Tx resonse (see WARN_ON below). |
| */ |
| if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
| is_ndp = true; |
| } |
| |
| /* |
| * 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]; |
| bool send_eosp_ndp = false; |
| |
| spin_lock_bh(&mvmsta->lock); |
| if (iwl_mvm_is_dqa_supported(mvm)) { |
| enum iwl_mvm_agg_state state; |
| |
| state = mvmsta->tid_data[tid].state; |
| txq_agg = (state == IWL_AGG_ON || |
| state == IWL_EMPTYING_HW_QUEUE_DELBA); |
| } else { |
| txq_agg = txq_id >= mvm->first_agg_queue; |
| } |
| |
| if (!is_ndp) { |
| tid_data->next_reclaimed = next_reclaimed; |
| IWL_DEBUG_TX_REPLY(mvm, |
| "Next reclaimed packet:%d\n", |
| next_reclaimed); |
| } else { |
| IWL_DEBUG_TX_REPLY(mvm, |
| "NDP - don't update next_reclaimed\n"); |
| } |
| |
| iwl_mvm_check_ratid_empty(mvm, sta, tid); |
| |
| if (mvmsta->sleep_tx_count) { |
| mvmsta->sleep_tx_count--; |
| if (mvmsta->sleep_tx_count && |
| !iwl_mvm_tid_queued(tid_data)) { |
| /* |
| * The number of frames in the queue |
| * dropped to 0 even if we sent less |
| * frames than we thought we had on the |
| * Tx queue. |
| * This means we had holes in the BA |
| * window that we just filled, ask |
| * mac80211 to send EOSP since the |
| * firmware won't know how to do that. |
| * Send NDP and the firmware will send |
| * EOSP notification that will trigger |
| * a call to ieee80211_sta_eosp(). |
| */ |
| send_eosp_ndp = true; |
| } |
| } |
| |
| spin_unlock_bh(&mvmsta->lock); |
| if (send_eosp_ndp) { |
| iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, |
| IEEE80211_FRAME_RELEASE_UAPSD, |
| 1, tid, false, false); |
| mvmsta->sleep_tx_count = 0; |
| ieee80211_send_eosp_nullfunc(sta, tid); |
| } |
| } |
| |
| 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_agg) |
| goto out; |
| |
| /* We can't free more than one frame at once on a shared queue */ |
| WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (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 iwl_mvm_sta *mvmsta; |
| int queue = SEQ_TO_QUEUE(sequence); |
| |
| if (WARN_ON_ONCE(queue < mvm->first_agg_queue && |
| (!iwl_mvm_is_dqa_supported(mvm) || |
| (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) |
| return; |
| |
| if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) |
| return; |
| |
| iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); |
| |
| rcu_read_lock(); |
| |
| mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); |
| |
| if (!WARN_ON_ONCE(!mvmsta)) { |
| mvmsta->tid_data[tid].rate_n_flags = |
| le32_to_cpu(tx_resp->initial_rate); |
| 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)ba_notif->reduced_txp; |
| 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); |
| |
| IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", |
| ba_notif->reduced_txp); |
| 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, false); |
| } |
| |
| 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; |
| } |