// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright ( C ) 2012 - 2014 , 2018 - 2025 Intel Corporation
* Copyright ( C ) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright ( C ) 2016 - 2017 Intel Deutschland GmbH
*/
#include <linux/ieee80211.h>
#include <linux/etherdevice.h>
#include <linux/tcp.h>
#include <net/gso.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include "iwl-trans.h"
#include "iwl-nvm-utils.h"
#include "iwl-utils.h"
#include "mvm.h"
#include "sta.h"
#include "time-sync.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;
trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
if (!trig)
return ;
ba_trig = (void *)trig->data;
if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
return ;
iwl_fw_dbg_collect_trig(&mvm->fwrt, 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 u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_tx_info *info,
bool amsdu)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
u16 offload_assist = 0 ;
#if IS_ENABLED(CONFIG_INET)
u8 protocol = 0 ;
/* Do not compute checksum if already computed */
if (skb->ip_summed != CHECKSUM_PARTIAL)
goto out;
/* 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);
goto out;
}
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);
goto out;
}
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);
goto out;
}
/* 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) && 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 ;
out:
#endif
/*
* mac header len should include IV , size is in words unless
* the IV is added by the firmware like in WEP .
* In new Tx API , the IV is always added by the firmware .
*/
if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
mh_len += info->control.hw_key->iv_len;
mh_len /= 2 ;
offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
if (amsdu)
offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
else if (ieee80211_hdrlen(hdr->frame_control) % 4 )
/* padding is inserted later in transport */
offload_assist |= BIT(TX_CMD_OFFLD_PAD);
return offload_assist;
}
/*
* 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_v6_params *tx_cmd_params,
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_params->tx_flags);
u32 len = skb->len + FCS_LEN;
bool amsdu = false ;
u8 ac;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
(ieee80211_is_probe_resp(fc) &&
!is_multicast_ether_addr(hdr->addr1)))
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_params->tid_tspec = qc[0 ] & 0 xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
} 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_params->tid_tspec = (control &
IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
WARN_ON_ONCE(tx_cmd_params->tid_tspec >= IWL_MAX_TID_COUNT);
iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd_params->tid_tspec,
ssn);
} else {
if (ieee80211_is_data(fc))
tx_cmd_params->tid_tspec = IWL_TID_NON_QOS;
else
tx_cmd_params->tid_tspec = IWL_MAX_TID_COUNT;
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_MAX_TID_COUNT */
if (tx_cmd_params->tid_tspec < IWL_MAX_TID_COUNT)
ac = tid_to_mac80211_ac[tx_cmd_params->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_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
else if (ieee80211_is_action(fc))
tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
else
tx_cmd_params->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_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
} else {
tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
}
if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
!is_multicast_ether_addr(hdr->addr1))
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_params->tx_flags = cpu_to_le32(tx_flags);
/* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
tx_cmd_params->len = cpu_to_le16((u16)skb->len);
tx_cmd_params->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
tx_cmd_params->sta_id = sta_id;
tx_cmd_params->offload_assist =
cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
}
static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta, __le16 fc)
{
if (info->band == NL80211_BAND_2GHZ &&
!iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
if (sta && ieee80211_is_data(fc)) {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
}
return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
}
static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
int rate_idx)
{
u32 rate_flags = 0 ;
u8 rate_plcp;
bool is_cck;
/* 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 = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
info,
info->control.vif);
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) &&
(rate_idx <= IWL_LAST_CCK_RATE);
/* Set CCK or OFDM flag */
if (!is_cck)
rate_flags |= RATE_MCS_MOD_TYPE_LEGACY_OFDM;
else
rate_flags |= RATE_MCS_MOD_TYPE_CCK;
return (u32)rate_plcp | rate_flags;
}
static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta,
__le16 fc)
{
struct ieee80211_tx_rate *rate = &info->control.rates[0 ];
u32 result;
if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
u8 mcs = ieee80211_rate_get_vht_mcs(rate);
u8 nss = ieee80211_rate_get_vht_nss(rate);
result = RATE_MCS_MOD_TYPE_VHT;
result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
result |= RATE_MCS_SGI_MSK;
if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
result |= RATE_MCS_CHAN_WIDTH_40;
else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
result |= RATE_MCS_CHAN_WIDTH_80;
else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
result |= RATE_MCS_CHAN_WIDTH_160;
} else if (rate->flags & IEEE80211_TX_RC_MCS) {
result = RATE_MCS_MOD_TYPE_HT;
result |= u32_encode_bits(rate->idx & 0 x7,
RATE_HT_MCS_CODE_MSK);
result |= u32_encode_bits(rate->idx >> 3 ,
RATE_MCS_NSS_MSK);
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
result |= RATE_MCS_SGI_MSK;
if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
result |= RATE_MCS_CHAN_WIDTH_40;
if (info->flags & IEEE80211_TX_CTL_LDPC)
result |= RATE_MCS_LDPC_MSK;
if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
result |= RATE_MCS_STBC_MSK;
} else {
int rate_idx = info->control.rates[0 ].idx;
result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
}
if (info->control.antennas)
result |= u32_encode_bits(info->control.antennas,
RATE_MCS_ANT_AB_MSK);
else
result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc);
return result;
}
static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta, __le16 fc)
{
int rate_idx = -1 ;
if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
/* info->control is only relevant for non HW rate control */
/* HT rate doesn't make sense for a non data frame */
WARN_ONCE(info->control.rates[0 ].flags & IEEE80211_TX_RC_MCS &&
!ieee80211_is_data(fc),
"Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n" ,
info->control.rates[0 ].flags,
info->control.rates[0 ].idx,
le16_to_cpu(fc),
sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1 );
rate_idx = info->control.rates[0 ].idx;
/* For non 2 GHZ band, remap mac80211 rate indices into driver
* indices .
*/
if (info->band != NL80211_BAND_2GHZ ||
(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
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 );
}
return iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
}
static __le32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta, __le16 fc)
{
u32 rate;
if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
rate = iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc);
else
rate = iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
iwl_mvm_get_tx_ant(mvm, info, sta, fc);
return iwl_mvm_v3_rate_to_fw(rate, mvm->fw_rates_ver);
}
/*
* 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_v6_params *tx_cmd_params,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta, __le16 fc)
{
/* Set retry limit on RTS packets */
tx_cmd_params->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_params->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
tx_cmd_params->rts_retry_limit =
min(tx_cmd_params->data_retry_limit, tx_cmd_params->rts_retry_limit);
} else if (ieee80211_is_back_req(fc)) {
tx_cmd_params->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
} else {
tx_cmd_params->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 (likely(ieee80211_is_data(fc) && sta &&
!(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
tx_cmd_params->initial_rate_index = 0 ;
tx_cmd_params->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
return ;
}
} else if (ieee80211_is_back_req(fc)) {
tx_cmd_params->tx_flags |=
cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
}
/* Set the rate in the TX cmd */
tx_cmd_params->rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc);
}
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 ] = 0 x20 | (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_v6_params *tx_cmd_params,
struct sk_buff *skb_frag,
int hdrlen)
{
struct ieee80211_key_conf *keyconf = info->control.hw_key;
u8 *crypto_hdr = skb_frag->data + hdrlen;
enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
u64 pn;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd_params);
iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
break ;
case WLAN_CIPHER_SUITE_TKIP:
tx_cmd_params->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_params->key);
break ;
case WLAN_CIPHER_SUITE_WEP104:
tx_cmd_params->sec_ctl |= TX_CMD_SEC_KEY128;
fallthrough;
case WLAN_CIPHER_SUITE_WEP40:
tx_cmd_params->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_params->key[3 ], keyconf->key, keyconf->keylen);
break ;
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
type = TX_CMD_SEC_GCMP;
fallthrough;
case WLAN_CIPHER_SUITE_CCMP_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_params->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
tx_cmd_params->key[0 ] = keyconf->hw_key_idx;
iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
break ;
default :
tx_cmd_params->sec_ctl |= TX_CMD_SEC_EXT;
}
}
static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta,
struct ieee80211_hdr *hdr,
struct ieee80211_tx_info *info)
{
if (unlikely(!mvmsta))
return true ;
if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
return true ;
if (likely(ieee80211_is_data(hdr->frame_control) &&
mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED))
return false ;
/*
* Not a data frame , use host rate if on an old device that
* can ' t possibly be doing MLO ( firmware may be selecting a
* bad rate ) , if we might be doing MLO we need to let FW pick
* ( since we don ' t necesarily know the link ) , but FW rate
* selection was fixed .
*/
return mvm->trans->mac_cfg->device_family < IWL_DEVICE_FAMILY_BZ;
}
static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
const u8 *addr3_override)
{
struct ieee80211_hdr *out_hdr = cmd;
memcpy(cmd, hdr, hdrlen);
if (addr3_override)
memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
}
/*
* Allocates and sets the Tx cmd the driver data pointers in the skb
*/
static struct iwl_device_tx_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,
const u8 *addr3_override)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct iwl_device_tx_cmd *dev_cmd;
struct iwl_tx_cmd_v6 *tx_cmd;
dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
if (unlikely(!dev_cmd))
return NULL;
dev_cmd->hdr.cmd = TX_CMD;
if (iwl_mvm_has_new_tx_api(mvm)) {
__le32 rate_n_flags = 0 ;
u16 flags = 0 ;
struct iwl_mvm_sta *mvmsta = sta ?
iwl_mvm_sta_from_mac80211(sta) : NULL;
bool amsdu = false ;
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
}
if (!info->control.hw_key)
flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
/*
* For data and mgmt packets rate info comes from the fw ( for
* new devices , older FW is somewhat broken for this ) . Only
* set rate / antenna for injected frames with fixed rate , or
* when no sta is given , or with older firmware .
*/
if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) {
flags |= IWL_TX_FLAGS_CMD_RATE;
rate_n_flags =
iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
hdr->frame_control);
} else if (!ieee80211_is_data(hdr->frame_control) ||
mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
/* These are important frames */
flags |= IWL_TX_FLAGS_HIGH_PRI;
}
if (mvm->trans->mac_cfg->device_family >=
IWL_DEVICE_FAMILY_AX210) {
struct iwl_tx_cmd *cmd = (void *)dev_cmd->payload;
u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
info, amsdu);
cmd->offload_assist = cpu_to_le32(offload_assist);
/* Total # bytes to be transmitted */
cmd->len = cpu_to_le16((u16)skb->len);
/* Copy MAC header from skb into command buffer */
iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
cmd->flags = cpu_to_le16(flags);
cmd->rate_n_flags = rate_n_flags;
} else {
struct iwl_tx_cmd_v9 *cmd = (void *)dev_cmd->payload;
u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
info, amsdu);
cmd->offload_assist = cpu_to_le16(offload_assist);
/* Total # bytes to be transmitted */
cmd->len = cpu_to_le16((u16)skb->len);
/* Copy MAC header from skb into command buffer */
iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
cmd->flags = cpu_to_le32(flags);
cmd->rate_n_flags = rate_n_flags;
}
goto out;
}
tx_cmd = (struct iwl_tx_cmd_v6 *)dev_cmd->payload;
if (info->control.hw_key)
iwl_mvm_set_tx_cmd_crypto(mvm, info, &tx_cmd->params, skb, hdrlen);
iwl_mvm_set_tx_cmd(mvm, skb, &tx_cmd->params, info, sta_id);
iwl_mvm_set_tx_cmd_rate(mvm, &tx_cmd->params, info, sta, hdr->frame_control);
/* Copy MAC header from skb into command buffer */
iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
out:
return dev_cmd;
}
static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
struct iwl_device_tx_cmd *cmd)
{
struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
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 ] = cmd;
}
static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
struct iwl_mvm_vif_link_info *link,
struct ieee80211_tx_info *info,
struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
__le16 fc = hdr->frame_control;
switch (info->control.vif->type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
/*
* Non - bufferable frames use the broadcast station , thus they
* use the probe queue .
* Also take care of the case where we send a deauth to a
* station that we don ' t have , or similarly an association
* response ( with non - success status ) for a station we can ' t
* accept .
* Also , disassociate frames might happen , particular with
* reason 7 ( " Class 3 frame received from nonassociated STA " ) .
*/
if (ieee80211_is_mgmt(fc) &&
(!ieee80211_is_bufferable_mmpdu(skb) ||
ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
return link->mgmt_queue;
if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
is_multicast_ether_addr(hdr->addr1))
return link->cab_queue;
WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
"fc=0x%02x" , le16_to_cpu(fc));
return link->mgmt_queue;
case NL80211_IFTYPE_P2P_DEVICE:
if (ieee80211_is_mgmt(fc))
return mvm->p2p_dev_queue;
WARN_ON_ONCE(1 );
return mvm->p2p_dev_queue;
default :
WARN_ONCE(1 , "Not a ctrl vif, no available queue\n" );
return -1 ;
}
}
static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(info->control.vif);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
struct iwl_probe_resp_data *resp_data;
const u8 *ie;
u8 *pos;
u8 match[] = {
(WLAN_OUI_WFA >> 16 ) & 0 xff,
(WLAN_OUI_WFA >> 8 ) & 0 xff,
WLAN_OUI_WFA & 0 xff,
WLAN_OUI_TYPE_WFA_P2P,
};
rcu_read_lock();
resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
if (!resp_data)
goto out;
if (!resp_data->notif.noa_active)
goto out;
ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
mgmt->u.probe_resp.variable,
skb->len - base_len,
match, 4 , 2 );
if (!ie) {
IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n" );
goto out;
}
if (skb_tailroom(skb) < resp_data->noa_len) {
if (pskb_expand_head(skb, 0 , resp_data->noa_len, GFP_ATOMIC)) {
IWL_ERR(mvm,
"Failed to reallocate probe resp\n" );
goto out;
}
}
pos = skb_put(skb, resp_data->noa_len);
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
/* Set length of IE body (not including ID and length itself) */
*pos++ = resp_data->noa_len - 2 ;
*pos++ = (WLAN_OUI_WFA >> 16 ) & 0 xff;
*pos++ = (WLAN_OUI_WFA >> 8 ) & 0 xff;
*pos++ = WLAN_OUI_WFA & 0 xff;
*pos++ = WLAN_OUI_TYPE_WFA_P2P;
memcpy(pos, &resp_data->notif.noa_attr,
resp_data->noa_len - sizeof (struct ieee80211_vendor_ie));
out:
rcu_read_unlock();
}
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;
struct iwl_device_tx_cmd *dev_cmd;
u8 sta_id;
int hdrlen = ieee80211_hdrlen(hdr->frame_control);
__le16 fc = hdr->frame_control;
bool offchannel = IEEE80211_SKB_CB(skb)->flags &
IEEE80211_TX_CTL_TX_OFFCHAN;
int queue = -1 ;
if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
return -1 ;
memcpy(&info, skb->cb, sizeof (info));
if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
return -1 ;
if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
return -1 ;
if (info.control.vif) {
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(info.control.vif);
bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE &&
p2p_aux) ||
(info.control.vif->type == NL80211_IFTYPE_STATION &&
offchannel)) {
/*
* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
* that can be used in 2 different types of vifs , P2P
* Device and STATION .
* P2P Device 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 P2P_DEV_OVER_AUX is supported ( p2p_aux = true )
* also P2P Device uses the aux queue .
*/
sta_id = mvm->aux_sta.sta_id;
queue = mvm->aux_queue;
if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE))
return -1 ;
} else if (info.control.vif->type ==
NL80211_IFTYPE_P2P_DEVICE ||
info.control.vif->type == NL80211_IFTYPE_AP ||
info.control.vif->type == NL80211_IFTYPE_ADHOC) {
u32 link_id = u32_get_bits(info.control.flags,
IEEE80211_TX_CTRL_MLO_LINK);
struct iwl_mvm_vif_link_info *link;
if (link_id == IEEE80211_LINK_UNSPECIFIED) {
if (info.control.vif->active_links)
link_id = ffs(info.control.vif->active_links) - 1 ;
else
link_id = 0 ;
}
link = mvmvif->link[link_id];
if (WARN_ON(!link))
return -1 ;
if (!ieee80211_is_data(hdr->frame_control))
sta_id = link->bcast_sta.sta_id;
else
sta_id = link->mcast_sta.sta_id;
queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
skb);
} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
queue = mvm->snif_queue;
sta_id = mvm->snif_sta.sta_id;
}
}
if (queue < 0 ) {
IWL_ERR(mvm, "No queue was found. Dropping TX\n" );
return -1 ;
}
if (unlikely(ieee80211_is_probe_resp(fc)))
iwl_mvm_probe_resp_set_noa(mvm, skb);
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,
NULL);
if (!dev_cmd)
return -1 ;
/* From now on, we cannot access info->control */
iwl_mvm_skb_prepare_status(skb, dev_cmd);
if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
return -1 ;
}
return 0 ;
}
unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
struct ieee80211_sta *sta, unsigned int tid)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
u8 ac = tid_to_mac80211_ac[tid];
enum nl80211_band band;
unsigned int txf;
unsigned int val;
int lmac;
/* For HE redirect to trigger based fifos */
if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
ac += 4 ;
txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
/*
* 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 .
*/
val = mvmsta->max_amsdu_len;
if (hweight16(sta->valid_links) <= 1 ) {
if (sta->valid_links) {
struct ieee80211_bss_conf *link_conf;
unsigned int link = ffs(sta->valid_links) - 1 ;
rcu_read_lock();
link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
if (WARN_ON(!link_conf))
band = NL80211_BAND_2GHZ;
else
band = link_conf->chanreq.oper.chan->band;
rcu_read_unlock();
} else {
band = mvmsta->vif->bss_conf.chanreq.oper.chan->band;
}
lmac = iwl_mvm_get_lmac_id(mvm, band);
} else if (fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
/* for real MLO restrict to both LMACs if they exist */
lmac = IWL_LMAC_5G_INDEX;
val = min_t(unsigned int , val,
mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256 );
lmac = IWL_LMAC_24G_INDEX;
} else {
lmac = IWL_LMAC_24G_INDEX;
}
return min_t(unsigned int , val,
mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256 );
}
#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;
unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
u16 snap_ip_tcp, pad;
netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
u8 tid;
snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb);
if (!mvmsta->max_amsdu_len ||
!ieee80211_is_data_qos(hdr->frame_control) ||
!mvmsta->amsdu_enabled)
return iwl_tx_tso_segment(skb, 1 , netdev_flags, mpdus_skb);
/*
* 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) {
netdev_flags &= ~NETIF_F_CSUM_MASK;
return iwl_tx_tso_segment(skb, 1 , netdev_flags, mpdus_skb);
}
tid = ieee80211_get_tid(hdr);
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
return -EINVAL;
/*
* 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) ||
!(mvmsta->amsdu_enabled & BIT(tid)))
return iwl_tx_tso_segment(skb, 1 , netdev_flags, mpdus_skb);
/*
* Take the min of ieee80211 station and mvm station
*/
max_amsdu_len =
min_t(unsigned int , sta->cur->max_amsdu_len,
iwl_mvm_max_amsdu_size(mvm, sta, tid));
/*
* 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->deflink.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) & 0 x3;
/*
* 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 (sta->max_amsdu_subframes &&
num_subframes > sta->max_amsdu_subframes)
num_subframes = sta->max_amsdu_subframes;
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
*/
if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1 ) >
mvm->trans->info.max_skb_frags)
num_subframes = 1 ;
if (num_subframes > 1 )
*ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
/* This skb fits in one single A-MSDU */
if (num_subframes * mss >= tcp_payload_len) {
__skb_queue_tail(mpdus_skb, skb);
return 0 ;
}
/*
* Trick the segmentation function to make it
* create SKBs that can fit into one A - MSDU .
*/
return iwl_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb);
}
#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
/* Check if there are any timed-out TIDs on a given shared TXQ */
static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
{
unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
unsigned long now = jiffies;
int tid;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
return false ;
for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1 ) {
if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
IWL_MVM_DQA_QUEUE_TIMEOUT, now))
return true ;
}
return false ;
}
static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta,
int airtime)
{
int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
struct iwl_mvm_tcm_mac *mdata;
if (mac >= NUM_MAC_INDEX_DRIVER)
return ;
mdata = &mvm->tcm.data[mac];
if (mvm->tcm.paused)
return ;
if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
schedule_delayed_work(&mvm->tcm.work, 0 );
mdata->tx.airtime += airtime;
}
static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta, int tid)
{
u32 ac = tid_to_mac80211_ac[tid];
int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
struct iwl_mvm_tcm_mac *mdata;
if (mac >= NUM_MAC_INDEX_DRIVER)
return -EINVAL;
mdata = &mvm->tcm.data[mac];
mdata->tx.pkts[ac]++;
return 0 ;
}
/*
* Sets the fields in the Tx cmd that are crypto related .
*
* This function must be called with BHs disabled .
*/
static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta,
const u8 *addr3_override)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct iwl_mvm_sta *mvmsta;
struct iwl_device_tx_cmd *dev_cmd;
__le16 fc;
u16 seq_number = 0 ;
u8 tid = IWL_MAX_TID_COUNT;
u16 txq_id;
bool is_ampdu = false ;
int hdrlen;
if (WARN_ON_ONCE(!sta))
return -1 ;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
fc = hdr->frame_control;
hdrlen = ieee80211_hdrlen(fc);
if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
return -1 ;
if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA))
return -1 ;
if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
return -1 ;
if (unlikely(ieee80211_is_probe_resp(fc)))
iwl_mvm_probe_resp_set_noa(mvm, skb);
dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
sta, mvmsta->deflink.sta_id,
addr3_override);
if (!dev_cmd)
goto drop;
/*
* 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);
/* nullfunc frames should go to the MGMT queue regardless of QOS,
* the conditions of ! ieee80211_is_qos_nullfunc ( fc ) and
* ! ieee80211_is_data_qos ( fc ) keep the default assignment of MGMT TID
*/
if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
tid = ieee80211_get_tid(hdr);
if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d" , tid))
goto drop_unlock_sta;
is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
if (WARN_ONCE(is_ampdu &&
mvmsta->tid_data[tid].state != IWL_AGG_ON,
"Invalid internal agg state %d for TID %d" ,
mvmsta->tid_data[tid].state, tid))
goto drop_unlock_sta;
seq_number = mvmsta->tid_data[tid].seq_number;
seq_number &= IEEE80211_SCTL_SEQ;
if (!iwl_mvm_has_new_tx_api(mvm)) {
struct iwl_tx_cmd_v6 *tx_cmd = (void *)dev_cmd->payload;
hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(seq_number);
/* update the tx_cmd hdr as it was already copied */
tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
}
} else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
!ieee80211_is_nullfunc(fc)) {
tid = IWL_TID_NON_QOS;
}
txq_id = mvmsta->tid_data[tid].txq_id;
WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id" )) {
iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
spin_unlock(&mvmsta->lock);
return -1 ;
}
if (!iwl_mvm_has_new_tx_api(mvm)) {
/* Keep track of the time of the last frame for this RA/TID */
mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
/*
* If we have timed - out TIDs - schedule the worker that will
* reconfig the queues and update them
*
* Note that the no lock is taken here in order to not serialize
* the TX flow . This isn ' t dangerous because scheduling
* mvm - > add_stream_wk can ' t ruin the state , and if we DON ' T
* schedule it due to some race condition then next TX we get
* here we will .
*/
if (unlikely(mvm->queue_info[txq_id].status ==
IWL_MVM_QUEUE_SHARED &&
iwl_mvm_txq_should_update(mvm, txq_id)))
schedule_work(&mvm->add_stream_wk);
}
IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n" ,
mvmsta->deflink.sta_id, tid, txq_id,
IEEE80211_SEQ_TO_SN(seq_number), skb->len);
/* From now on, we cannot access info->control */
iwl_mvm_skb_prepare_status(skb, dev_cmd);
/*
* The IV is introduced by the HW for new tx api , and it is not present
* in the skb , hence , don ' t tell iwl_mvm_mei_tx_copy_to_csme about the
* IV for those devices .
*/
if (ieee80211_is_data(fc))
iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
info->control.hw_key &&
!iwl_mvm_has_new_tx_api(mvm) ?
info->control.hw_key->iv_len : 0 );
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 + 0 x10;
spin_unlock(&mvmsta->lock);
if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
tid == IWL_MAX_TID_COUNT ? 0 : tid))
goto drop;
return 0 ;
drop_unlock_sta:
iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
spin_unlock(&mvmsta->lock);
drop:
IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n" , mvmsta->deflink.sta_id,
tid);
return -1 ;
}
int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta;
struct ieee80211_tx_info info;
struct sk_buff_head mpdus_skbs;
struct ieee80211_vif *vif;
unsigned int payload_len;
int ret;
struct sk_buff *orig_skb = skb;
const u8 *addr3;
if (WARN_ON_ONCE(!sta))
return -1 ;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA))
return -1 ;
memcpy(&info, skb->cb, sizeof (info));
if (!skb_is_gso(skb))
return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
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, NULL);
__skb_queue_head_init(&mpdus_skbs);
vif = info.control.vif;
if (!vif)
return -1 ;
ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
if (ret)
return ret;
WARN_ON(skb_queue_empty(&mpdus_skbs));
/*
* As described in IEEE sta 802 . 11 - 2020 , table 9 - 30 ( Address
* field contents ) , A - MSDU address 3 should contain the BSSID
* address .
* Pass address 3 down to iwl_mvm_tx_mpdu ( ) and further to set it
* in the command header . We need to preserve the original
* address 3 in the skb header to correctly create all the
* A - MSDU subframe headers from it .
*/
switch (vif->type) {
case NL80211_IFTYPE_STATION:
addr3 = vif->cfg.ap_addr;
break ;
case NL80211_IFTYPE_AP:
addr3 = vif->addr;
break ;
default :
addr3 = NULL;
break ;
}
while (!skb_queue_empty(&mpdus_skbs)) {
struct ieee80211_hdr *hdr;
bool amsdu;
skb = __skb_dequeue(&mpdus_skbs);
hdr = (void *)skb->data;
amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
(*ieee80211_get_qos_ctl(hdr) &
IEEE80211_QOS_CTL_A_MSDU_PRESENT);
ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
amsdu ? addr3 : NULL);
if (ret) {
/* Free skbs created as part of TSO logic that have not yet been dequeued */
__skb_queue_purge(&mpdus_skbs);
/* skb here is not necessarily same as skb that entered this method,
* so free it explicitly .
*/
if (skb == orig_skb)
ieee80211_free_txskb(mvm->hw, skb);
else
kfree_skb(skb);
/* there was error, but we consumed skb one way or another, so return 0 */
return 0 ;
}
}
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;
u16 normalized_ssn;
lockdep_assert_held(&mvmsta->lock);
if (tid_data->state == IWL_AGG_ON &&
iwl_mvm_tid_queued(mvm, tid_data) == 0 ) {
/*
* Now that this aggregation or DQA 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 );
}
/*
* In 22000 HW , the next_reclaimed index is only 8 bit , so we ' ll need
* to align the wrap around of ssn so we compare relevant values .
*/
normalized_ssn = tid_data->ssn;
if (mvm->trans->mac_cfg->gen2)
normalized_ssn &= 0 xff;
if (normalized_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 ;
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 */
static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
{
switch (chan_width) {
case RATE_MCS_CHAN_WIDTH_20:
return 0 ;
case RATE_MCS_CHAN_WIDTH_40:
return IEEE80211_TX_RC_40_MHZ_WIDTH;
case RATE_MCS_CHAN_WIDTH_80:
return IEEE80211_TX_RC_80_MHZ_WIDTH;
case RATE_MCS_CHAN_WIDTH_160:
return IEEE80211_TX_RC_160_MHZ_WIDTH;
default :
return 0 ;
}
}
void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
enum nl80211_band band,
struct ieee80211_tx_rate *r)
{
u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
u32 rate = format == RATE_MCS_MOD_TYPE_HT ?
RATE_HT_MCS_INDEX(rate_n_flags) :
rate_n_flags & RATE_MCS_CODE_MSK;
r->flags |=
iwl_mvm_get_hwrate_chan_width(rate_n_flags &
RATE_MCS_CHAN_WIDTH_MSK);
if (rate_n_flags & RATE_MCS_SGI_MSK)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
switch (format) {
case RATE_MCS_MOD_TYPE_HT:
r->flags |= IEEE80211_TX_RC_MCS;
r->idx = rate;
break ;
case RATE_MCS_MOD_TYPE_VHT:
ieee80211_rate_set_vht(r, rate,
FIELD_GET(RATE_MCS_NSS_MSK,
rate_n_flags) + 1 );
r->flags |= IEEE80211_TX_RC_VHT_MCS;
break ;
case RATE_MCS_MOD_TYPE_HE:
case RATE_MCS_MOD_TYPE_EHT:
/* mac80211 cannot do this without ieee80211_tx_status_ext()
* but it only matters for radiotap */
r->idx = 0 ;
break ;
default :
r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
band);
}
}
/*
* translate ucode response to mac80211 tx status control values
*/
static void iwl_mvm_hwrate_to_tx_status(struct iwl_mvm *mvm,
__le32 rate_n_flags,
struct ieee80211_tx_info *info)
{
struct ieee80211_tx_rate *r = &info->status.rates[0 ];
u32 rate;
/*
* Technically this conversion is incorrect for BA status , however :
* - we only use the BA notif data for older firmware that have
* host rate scaling and don ' t use newer rate formats
* - the firmware API changed together for BA notif and TX CMD
* as well
*/
rate = iwl_mvm_v3_rate_from_fw(rate_n_flags, mvm->fw_rates_ver);
info->status.antenna =
((rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
iwl_mvm_hwrate_to_tx_rate(rate, info->band, r);
}
static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
u32 status, __le16 frame_control)
{
struct iwl_fw_dbg_trigger_tlv *trig;
struct iwl_fw_dbg_trigger_tx_status *status_trig;
int i;
if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
enum iwl_fw_ini_time_point tp =
IWL_FW_INI_TIME_POINT_TX_FAILED;
if (ieee80211_is_action(frame_control))
tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
iwl_dbg_tlv_time_point(&mvm->fwrt,
tp, NULL);
return ;
}
trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
FW_DBG_TRIGGER_TX_STATUS);
if (!trig)
return ;
status_trig = (void *)trig->data;
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_fw_dbg_collect_trig(&mvm->fwrt, trig,
"Tx status %d was received" ,
status & TX_STATUS_MSK);
break ;
}
}
/*
* iwl_mvm_get_scd_ssn - returns the SSN of the SCD
* @ tx_resp : the Tx response from the fw ( agg or non - agg )
*
* When the fw sends an AMPDU , it fetches the MPDUs one after the other . Since
* it can ' t know that everything will go well until the end of the AMPDU , it
* can ' t know in advance the number of MPDUs that will be sent in the current
* batch . This is why it writes the agg Tx response while it fetches the MPDUs .
* Hence , it can ' t know in advance what the SSN of the SCD will be at the end
* of the batch . This is why the SSN of the SCD is written at the end of the
* whole struct at a variable offset . This function knows how to cope with the
* variable offset and returns the SSN of the SCD .
*
* For 22000 - series and lower , this is just 12 bits . For later , 16 bits .
*/
static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
struct iwl_tx_resp *tx_resp)
{
u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
tx_resp->frame_count);
if (mvm->trans->mac_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
return val & 0 xFFFF;
return val & 0 xFFF;
}
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_tx_resp_v3 is almost the same */
struct iwl_tx_resp *tx_resp = (void *)pkt->data;
int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid);
int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid);
struct agg_tx_status *agg_status =
iwl_mvm_get_agg_status(mvm, tx_resp);
u32 status = le16_to_cpu(agg_status->status);
u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
struct sk_buff_head skbs;
u8 skb_freed = 0 ;
u8 lq_color;
u16 next_reclaimed, seq_ctl;
bool is_ndp = false ;
__skb_queue_head_init(&skbs);
if (iwl_mvm_has_new_tx_api(mvm))
txq_id = le16_to_cpu(tx_resp->tx_queue);
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, false );
while (!skb_queue_empty(&skbs)) {
struct sk_buff *skb = __skb_dequeue(&skbs);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (void *)skb->data;
bool flushed = false ;
skb_freed++;
iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1 ]);
memset(&info->status, 0 , sizeof (info->status));
info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
/* 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_FIFO_FLUSHED:
case TX_STATUS_FAIL_DRAIN_FLOW:
flushed = true ;
break ;
case TX_STATUS_FAIL_DEST_PS:
/* the FW should have stopped the queue and not
* return this status
*/
IWL_ERR_LIMIT(mvm,
"FW reported TX filtered, status=0x%x, FC=0x%x\n" ,
status, le16_to_cpu(hdr->frame_control));
info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
break ;
default :
break ;
}
if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
ieee80211_is_mgmt(hdr->frame_control))
iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
/*
* If we are freeing multiple frames , mark all the frames
* but the first one as acked , since they were acknowledged
* before
* */
if (skb_freed > 1 )
info->flags |= IEEE80211_TX_STAT_ACK;
iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
info->status.rates[0 ].count = tx_resp->failure_frame + 1 ;
iwl_mvm_hwrate_to_tx_status(mvm, tx_resp->initial_rate, info);
/* Don't assign the converted initial_rate, because driver
* TLC uses this and doesn ' t support the new FW rate
*/
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 (info->flags & IEEE80211_TX_CTL_AMPDU &&
!(info->flags & IEEE80211_TX_STAT_ACK) &&
!(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
/* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
if (ieee80211_is_back_req(hdr->frame_control))
seq_ctl = 0 ;
else if (status != TX_STATUS_SUCCESS)
seq_ctl = le16_to_cpu(hdr->seq_ctrl);
if (unlikely(!seq_ctl)) {
/*
* 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 );
lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
info->status.status_driver_data[0 ] =
RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
ieee80211_tx_status_skb(mvm->hw, skb);
}
/* This is an aggregation queue or might become one, so 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;
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)) {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
iwl_mvm_tx_airtime(mvm, mvmsta,
le16_to_cpu(tx_resp->wireless_media_time));
if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
if (sta->wme && tid != IWL_MGMT_TID) {
struct iwl_mvm_tid_data *tid_data =
&mvmsta->tid_data[tid];
bool send_eosp_ndp = false ;
spin_lock_bh(&mvmsta->lock);
if (!is_ndp) {
tid_data->next_reclaimed = next_reclaimed;
IWL_DEBUG_TX_REPLY(mvm,
"Next reclaimed packet:%d\n" ,
next_reclaimed);
if (tid < IWL_MAX_TID_COUNT)
iwl_mvm_count_mpdu(mvmsta, sta_id, 1 ,
true , 0 );
} 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(mvm, 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);
}
}
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_(TX_ON_AIR_DROP);
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_tx_resp *tx_resp = (void *)pkt->data;
struct agg_tx_status *frame_status =
iwl_mvm_get_agg_status(mvm, tx_resp);
int i;
bool tirgger_timepoint = false ;
for (i = 0 ; i < tx_resp->frame_count; i++) {
u16 fstatus = le16_to_cpu(frame_status[i].status);
/* In case one frame wasn't transmitted trigger time point */
tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
AGG_TX_STATE_TRANSMITTED);
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));
}
if (tirgger_timepoint)
iwl_dbg_tlv_time_point(&mvm->fwrt,
IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
}
#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_tx_resp *tx_resp = (void *)pkt->data;
int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid);
int tid = IWL_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);
struct ieee80211_sta *sta;
if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
(queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
return ;
iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
rcu_read_unlock();
return ;
}
if (!WARN_ON_ONCE(!mvmsta)) {
mvmsta->tid_data[tid].rate_n_flags =
tx_resp->initial_rate;
mvmsta->tid_data[tid].tx_time =
le16_to_cpu(tx_resp->wireless_media_time);
mvmsta->tid_data[tid].lq_color =
TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
iwl_mvm_tx_airtime(mvm, mvmsta,
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_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_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
int txq, int index,
struct ieee80211_tx_info *tx_info, __le32 rate,
bool is_flush)
{
struct sk_buff_head reclaimed_skbs;
struct iwl_mvm_tid_data *tid_data = NULL;
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta = NULL;
struct sk_buff *skb;
int freed;
if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
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(!sta)) {
rcu_read_unlock();
return ;
}
__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, txq, index, &reclaimed_skbs, is_flush);
skb_queue_walk(&reclaimed_skbs, skb) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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 .
*/
if (!is_flush)
info->flags |= IEEE80211_TX_STAT_ACK;
else
info->flags &= ~IEEE80211_TX_STAT_ACK;
}
/*
* It ' s possible to get a BA response after invalidating the rcu ( rcu is
* invalidated in order to prevent new Tx from being sent , but there may
* be some frames already in - flight ) .
* In this case we just want to reclaim , and could skip all the
* sta - dependent stuff since it ' s in the middle of being removed
* anyways .
*/
if (IS_ERR(sta))
goto out;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
tid_data = &mvmsta->tid_data[tid];
if (tid_data->txq_id != txq) {
IWL_ERR(mvm,
"invalid reclaim request: Q %d, tid %d\n" ,
tid_data->txq_id, tid);
rcu_read_unlock();
return ;
}
spin_lock_bh(&mvmsta->lock);
tid_data->next_reclaimed = index;
iwl_mvm_check_ratid_empty(mvm, sta, tid);
freed = 0 ;
/* pack lq color from tid_data along the reduced txp */
tx_info->status.status_driver_data[0 ] =
RS_DRV_DATA_PACK(tid_data->lq_color,
tx_info->status.status_driver_data[0 ]);
/* the value is only consumed for old FW that has v1 rates anyway */
tx_info->status.status_driver_data[1 ] =
(void *)(uintptr_t)le32_to_cpu(rate);
skb_queue_walk(&reclaimed_skbs, skb) {
struct ieee80211_hdr *hdr = (void *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (!is_flush) {
if (ieee80211_is_data_qos(hdr->frame_control))
freed++;
else
WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
}
/* this is the first skb we deliver in this batch */
/* put the rate scaling data there */
if (freed == 1 ) {
info->flags |= IEEE80211_TX_STAT_AMPDU;
memcpy(&info->status, &tx_info->status,
sizeof (tx_info->status));
iwl_mvm_hwrate_to_tx_status(mvm, rate, info);
}
}
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 (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
!iwl_mvm_has_tlc_offload(mvm)) {
struct ieee80211_chanctx_conf *chanctx_conf = NULL;
/* no TLC offload, so non-MLD mode */
if (mvmsta->vif)
chanctx_conf =
rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
if (WARN_ON_ONCE(!chanctx_conf))
goto out;
tx_info->band = chanctx_conf->def.chan->band;
iwl_mvm_hwrate_to_tx_status(mvm, rate, tx_info);
IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n" );
iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false );
}
out:
rcu_read_unlock();
while (!skb_queue_empty(&reclaimed_skbs)) {
skb = __skb_dequeue(&reclaimed_skbs);
ieee80211_tx_status_skb(mvm->hw, skb);
}
}
void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
int sta_id, tid, txq, index;
struct ieee80211_tx_info ba_info = {};
struct iwl_mvm_ba_notif *ba_notif;
struct iwl_mvm_tid_data *tid_data;
struct iwl_mvm_sta *mvmsta;
ba_info.flags = IEEE80211_TX_STAT_AMPDU;
if (iwl_mvm_has_new_tx_api(mvm)) {
struct iwl_compressed_ba_notif *ba_res =
(void *)pkt->data;
u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
u16 tfd_cnt;
int i;
if (IWL_FW_CHECK(mvm, sizeof (*ba_res) > pkt_len,
"short BA notification (%d)\n" , pkt_len))
return ;
sta_id = ba_res->sta_id;
ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
ba_info.status.tx_time =
(u16)le32_to_cpu(ba_res->wireless_time);
ba_info.status.status_driver_data[0 ] =
(void *)(uintptr_t)ba_res->reduced_txp;
tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
if (!tfd_cnt)
return ;
if (IWL_FW_CHECK(mvm,
struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
"short BA notification (tfds:%d, size:%d)\n" ,
tfd_cnt, pkt_len))
return ;
IWL_DEBUG_TX_REPLY(mvm,
"BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n" ,
sta_id, le32_to_cpu(ba_res->flags),
le16_to_cpu(ba_res->txed),
le16_to_cpu(ba_res->done));
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
/*
* It ' s possible to get a BA response after invalidating the rcu
* ( rcu is invalidated in order to prevent new Tx from being
* sent , but there may be some frames already in - flight ) .
* In this case we just want to reclaim , and could skip all the
* sta - dependent stuff since it ' s in the middle of being removed
* anyways .
*/
/* Free per TID */
for (i = 0 ; i < tfd_cnt; i++) {
struct iwl_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i];
tid = ba_tfd->tid;
if (tid == IWL_MGMT_TID)
tid = IWL_MAX_TID_COUNT;
if (mvmsta)
mvmsta->tid_data[i].lq_color = lq_color;
iwl_mvm_tx_reclaim(mvm, sta_id, tid,
(int )(le16_to_cpu(ba_tfd->q_num)),
le16_to_cpu(ba_tfd->tfd_index),
&ba_info,
ba_res->tx_rate, false );
}
if (mvmsta) {
iwl_mvm_tx_airtime(mvm, mvmsta,
le32_to_cpu(ba_res->wireless_time));
iwl_mvm_count_mpdu(mvmsta, sta_id,
le16_to_cpu(ba_res->txed), true , 0 );
}
rcu_read_unlock();
return ;
}
ba_notif = (void *)pkt->data;
sta_id = ba_notif->sta_id;
tid = ba_notif->tid;
/* "flow" corresponds to Tx queue */
txq = 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 */
index = le16_to_cpu(ba_notif->scd_ssn);
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
if (IWL_FW_CHECK(mvm, !mvmsta,
"invalid STA ID %d in BA notif\n" ,
sta_id)) {
rcu_read_unlock();
return ;
}
tid_data = &mvmsta->tid_data[tid];
ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
ba_info.status.ampdu_len = ba_notif->txed;
ba_info.status.tx_time = tid_data->tx_time;
ba_info.status.status_driver_data[0 ] =
(void *)(uintptr_t)ba_notif->reduced_txp;
rcu_read_unlock();
IWL_DEBUG_TX_REPLY(mvm,
"BA_NOTIFICATION Received from %pM, sta_id = %d\n" ,
ba_notif->sta_addr, 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),
le64_to_cpu(ba_notif->bitmap), txq, index,
ba_notif->txed, ba_notif->txed_2_done);
IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n" ,
ba_notif->reduced_txp);
iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
tid_data->rate_n_flags, false );
}
/*
* 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)
{
int ret;
struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
.queues_ctl = cpu_to_le32(tfd_msk),
.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
};
WARN_ON(iwl_mvm_has_new_tx_api(mvm));
ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0 ,
sizeof (flush_cmd), &flush_cmd);
if (ret)
IWL_ERR(mvm, "Failed to send flush command (%d)\n" , ret);
return ret;
}
int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
{
int ret;
struct iwl_tx_path_flush_cmd_rsp *rsp;
struct iwl_tx_path_flush_cmd flush_cmd = {
.sta_id = cpu_to_le32(sta_id),
.tid_mask = cpu_to_le16(tids),
};
struct iwl_host_cmd cmd = {
.id = TXPATH_FLUSH,
.len = { sizeof (flush_cmd), },
.data = { &flush_cmd, },
};
WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0 ) > 0 )
cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n" ,
sta_id, tids);
ret = iwl_mvm_send_cmd(mvm, &cmd);
if (ret) {
IWL_ERR(mvm, "Failed to send flush command (%d)\n" , ret);
return ret;
}
if (cmd.flags & CMD_WANT_SKB) {
int i;
int num_flushed_queues;
if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof (*rsp))) {
ret = -EIO;
goto free_rsp;
}
rsp = (void *)cmd.resp_pkt->data;
if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
"sta_id %d != rsp_sta_id %d" ,
sta_id, le16_to_cpu(rsp->sta_id))) {
ret = -EIO;
goto free_rsp;
}
num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
"num_flushed_queues %d" , num_flushed_queues)) {
ret = -EIO;
goto free_rsp;
}
for (i = 0 ; i < num_flushed_queues; i++) {
struct ieee80211_tx_info tx_info = {};
struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
int tid = le16_to_cpu(queue_info->tid);
int read_before = le16_to_cpu(queue_info->read_before_flush);
int read_after = le16_to_cpu(queue_info->read_after_flush);
int queue_num = le16_to_cpu(queue_info->queue_num);
if (tid == IWL_MGMT_TID)
tid = IWL_MAX_TID_COUNT;
IWL_DEBUG_TX_QUEUES(mvm,
"tid %d queue_id %d read-before %d read-after %d\n" ,
tid, queue_num, read_before, read_after);
iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
&tx_info, 0 , true );
}
free_rsp:
iwl_free_resp(&cmd);
}
return ret;
}
int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
{
if (iwl_mvm_has_new_tx_api(mvm))
return iwl_mvm_flush_sta_tids(mvm, sta_id, 0 xffff);
return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
}
Messung V0.5 in Prozent C=96 H=94 G=94
¤ Dauer der Verarbeitung: 0.48 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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