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linuxdebug/drivers/net/wireless/intel/iwlwifi/mvm/tx.c

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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2012-2014, 2018-2021 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/ip.h>
#include <net/ipv6.h>
#include "iwl-trans.h"
#include "iwl-eeprom-parse.h"
#include "mvm.h"
#include "sta.h"
static void
iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
u16 tid, u16 ssn)
{
struct iwl_fw_dbg_trigger_tlv *trig;
struct iwl_fw_dbg_trigger_ba *ba_trig;
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 u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_tx_info *info, bool amsdu)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
u16 offload_assist = 0;
#if IS_ENABLED(CONFIG_INET)
u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
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;
/*
* 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;
out:
#endif
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;
}
u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM;
unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
unsigned int csum_start = skb_checksum_start_offset(skb);
offload_assist |= u32_encode_bits(hdrlen / 2,
IWL_TX_CMD_OFFLD_BZ_MH_LEN);
if (amsdu)
offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU;
else if (hdrlen % 4)
/* padding is inserted later in transport */
offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD;
if (skb->ip_summed != CHECKSUM_PARTIAL)
return offload_assist;
offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM |
IWL_TX_CMD_OFFLD_BZ_ZERO2ONES;
/*
* mac80211 will always calculate checksum in software for
* non-fast-xmit, and so we can only do offloaded checksum
* for fast-xmit frames. In this case, we always have the
* RFC 1042 header present. skb_checksum_start_offset()
* returns the offset from the beginning, but the hardware
* needs it from after the header & SNAP header.
*/
csum_start -= hdrlen + 8;
offload_assist |= u32_encode_bits(csum_start,
IWL_TX_CMD_OFFLD_BZ_START_OFFS);
offload_assist |= u32_encode_bits(csum_start + skb->csum_offset,
IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS);
return offload_assist;
}
static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_tx_info *info,
bool amsdu)
{
if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu);
return iwl_mvm_tx_csum_bz(mvm, skb, amsdu);
}
/*
* Sets most of the Tx cmd's fields
*/
void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
struct iwl_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info, u8 sta_id)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
__le16 fc = hdr->frame_control;
u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
u32 len = skb->len + FCS_LEN;
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->tid_tspec = qc[0] & 0xf;
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->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 {
if (ieee80211_is_data(fc))
tx_cmd->tid_tspec = IWL_TID_NON_QOS;
else
tx_cmd->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->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(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->tx_flags = cpu_to_le32(tx_flags);
/* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
tx_cmd->len = cpu_to_le16((u16)skb->len);
tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
tx_cmd->sta_id = sta_id;
tx_cmd->offload_assist =
cpu_to_le16(iwl_mvm_tx_csum_pre_bz(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_get_tx_rate(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta, __le16 fc)
{
int rate_idx = -1;
u8 rate_plcp;
u32 rate_flags = 0;
bool is_cck;
/* info->control is only relevant for non HW rate control */
if (!ieee80211_hw_check(mvm->hw, HAS_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;
}
/* 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 non 2 GHZ band, remap mac80211 rate
* indices into driver indices
*/
if (info->band != NL80211_BAND_2GHZ)
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(mvm->fw, rate_idx);
is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
/* Set CCK or OFDM flag */
if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
if (!is_cck)
rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
else
rate_flags |= RATE_MCS_CCK_MSK;
} else if (is_cck) {
rate_flags |= RATE_MCS_CCK_MSK_V1;
}
return (u32)rate_plcp | rate_flags;
}
static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta, __le16 fc)
{
return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
iwl_mvm_get_tx_ant(mvm, info, sta, fc);
}
/*
* 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)
{
/* 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) {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
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);
}
/* Set the rate in the TX cmd */
tx_cmd->rate_n_flags =
cpu_to_le32(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] = 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;
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);
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;
fallthrough;
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:
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->sec_ctl |= type | TX_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_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)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct iwl_device_tx_cmd *dev_cmd;
struct iwl_tx_cmd *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)) {
u32 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 packets rate info comes from the fw. Only
* set rate/antenna during connection establishment or in case
* no station is given.
*/
if (!sta || !ieee80211_is_data(hdr->frame_control) ||
mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
flags |= IWL_TX_FLAGS_CMD_RATE;
rate_n_flags =
iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
hdr->frame_control);
}
if (mvm->trans->trans_cfg->device_family >=
IWL_DEVICE_FAMILY_AX210) {
struct iwl_tx_cmd_gen3 *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 */
memcpy(cmd->hdr, hdr, hdrlen);
cmd->flags = cpu_to_le16(flags);
cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
} else {
struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
u16 offload_assist = iwl_mvm_tx_csum_pre_bz(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 */
memcpy(cmd->hdr, hdr, hdrlen);
cmd->flags = cpu_to_le32(flags);
cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
}
goto out;
}
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);
/* Copy MAC header from skb into command buffer */
memcpy(tx_cmd->hdr, hdr, hdrlen);
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 ieee80211_tx_info *info,
struct ieee80211_hdr *hdr)
{
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(info->control.vif);
__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(fc) ||
ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
return mvm->probe_queue;
if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
is_multicast_ether_addr(hdr->addr1))
return mvmvif->cab_queue;
WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
"fc=0x%02x", le16_to_cpu(fc));
return mvm->probe_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) & 0xff,
(WLAN_OUI_WFA >> 8) & 0xff,
WLAN_OUI_WFA & 0xff,
WLAN_OUI_TYPE_WFA_P2P,
};
rcu_read_lock();
resp_data = rcu_dereference(mvmvif->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) & 0xff;
*pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
*pos++ = WLAN_OUI_WFA & 0xff;
*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);
if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
info.control.vif->type == NL80211_IFTYPE_AP ||
info.control.vif->type == NL80211_IFTYPE_ADHOC) {
if (!ieee80211_is_data(hdr->frame_control))
sta_id = mvmvif->bcast_sta.sta_id;
else
sta_id = mvmvif->mcast_sta.sta_id;
queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
queue = mvm->snif_queue;
sta_id = mvm->snif_sta.sta_id;
} else if (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 &
* 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.
*/
sta_id = mvm->aux_sta.sta_id;
queue = mvm->aux_queue;
}
}
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);
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->chandef.chan->band;
rcu_read_unlock();
} else {
band = mvmsta->vif->bss_conf.chandef.chan->band;
}
lmac = iwl_mvm_get_lmac_id(mvm->fw, 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_segment(struct sk_buff *skb, unsigned int num_subframes,
netdev_features_t netdev_flags,
struct sk_buff_head *mpdus_skb)
{
struct sk_buff *tmp, *next;
struct ieee80211_hdr *hdr = (void *)skb->data;
char cb[sizeof(skb->cb)];
u16 i = 0;
unsigned int tcp_payload_len;
unsigned int mss = skb_shinfo(skb)->gso_size;
bool ipv4 = (skb->protocol == htons(ETH_P_IP));
bool qos = ieee80211_is_data_qos(hdr->frame_control);
u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
skb_shinfo(skb)->gso_size = num_subframes * mss;
memcpy(cb, skb->cb, sizeof(cb));
next = skb_gso_segment(skb, netdev_flags);
skb_shinfo(skb)->gso_size = mss;
skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
if (WARN_ON_ONCE(IS_ERR(next)))
return -EINVAL;
else if (next)
consume_skb(skb);
skb_list_walk_safe(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) {
skb_shinfo(tmp)->gso_size = mss;
skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
SKB_GSO_TCPV6;
} else {
if (qos) {
u8 *qc;
if (ipv4)
ip_send_check(ip_hdr(tmp));
qc = ieee80211_get_qos_ctl((void *)tmp->data);
*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
}
skb_shinfo(tmp)->gso_size = 0;
}
skb_mark_not_on_list(tmp);
__skb_queue_tail(mpdus_skb, tmp);
i++;
}
return 0;
}
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_transport_header(skb) - skb_network_header(skb) +
tcp_hdrlen(skb);
if (!mvmsta->max_amsdu_len ||
!ieee80211_is_data_qos(hdr->frame_control) ||
!mvmsta->amsdu_enabled)
return iwl_mvm_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_mvm_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_mvm_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) & 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 (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->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_mvm_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)
{
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;
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))
return -1;
if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_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->sta_id);
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 condition of !ieee80211_is_qos_nullfunc(fc) keeps 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 *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)) {
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->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 + 0x10;
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->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 = iwl_mvm_sta_from_mac80211(sta);
struct ieee80211_tx_info info;
struct sk_buff_head mpdus_skbs;
unsigned int payload_len;
int ret;
struct sk_buff *orig_skb = skb;
if (WARN_ON_ONCE(!mvmsta))
return -1;
if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
return -1;
memcpy(&info, skb->cb, sizeof(info));
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) {
/* 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 ||
tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
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->trans_cfg->gen2)
normalized_ssn &= 0xff;
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;
case IWL_EMPTYING_HW_QUEUE_DELBA:
IWL_DEBUG_TX_QUEUES(mvm,
"Can continue DELBA flow ssn = next_recl = %d\n",
tid_data->next_reclaimed);
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 */
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_HT_MSK ?
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;
if (format == RATE_MCS_HT_MSK) {
r->flags |= IEEE80211_TX_RC_MCS;
r->idx = rate;
} else if (format == RATE_MCS_VHT_MSK) {
ieee80211_rate_set_vht(r, rate,
((rate_n_flags & RATE_MCS_NSS_MSK) >>
RATE_MCS_NSS_POS) + 1);
r->flags |= IEEE80211_TX_RC_VHT_MCS;
} else if (format == RATE_MCS_HE_MSK) {
/* mac80211 cannot do this without ieee80211_tx_status_ext()
* but it only matters for radiotap */
r->idx = 0;
} else {
r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
band);
}
}
void iwl_mvm_hwrate_to_tx_rate_v1(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;
r->flags |=
iwl_mvm_get_hwrate_chan_width(rate_n_flags &
RATE_MCS_CHAN_WIDTH_MSK_V1);
if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
r->flags |= IEEE80211_TX_RC_MCS;
r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
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(const struct iwl_fw *fw,
u32 rate_n_flags,
struct ieee80211_tx_info *info)
{
struct ieee80211_tx_rate *r = &info->status.rates[0];
if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
TX_CMD, 0) <= 6)
rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
info->status.antenna =
((rate_n_flags & RATE_MCS_ANT_AB_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, __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.
*/
static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
struct iwl_mvm_tx_resp *tx_resp)
{
return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
tx_resp->frame_count) & 0xfff;
}
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_v3 is almost the same */
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);
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);
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));
/* 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->fw,
le32_to_cpu(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);
ieee80211_tx_status(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);
} 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_mvm_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_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);
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(!sta || !sta->wme)) {
rcu_read_unlock();
return;
}
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);
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_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_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
int txq, int index,
struct ieee80211_tx_info *tx_info, u32 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);
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;
}
/*
* 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]);
tx_info->status.status_driver_data[1] = (void *)(uintptr_t)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->fw, 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)) {
struct ieee80211_chanctx_conf *chanctx_conf = NULL;
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->fw, rate, tx_info);
if (!iwl_mvm_has_tlc_offload(mvm)) {
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(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_mvm_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 (unlikely(sizeof(*ba_res) > 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 || struct_size(ba_res, tfd, tfd_cnt) > pkt_len)
return;
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_mvm_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,
le32_to_cpu(ba_res->tx_rate), false);
}
if (mvmsta)
iwl_mvm_tx_airtime(mvm, mvmsta,
le32_to_cpu(ba_res->wireless_time));
rcu_read_unlock();
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));
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 (WARN_ON_ONCE(!mvmsta)) {
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_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
tid_data->rate_n_flags, false);
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);
}
/*
* 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;
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, void *sta, bool internal)
{
struct iwl_mvm_int_sta *int_sta = sta;
struct iwl_mvm_sta *mvm_sta = sta;
BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
offsetof(struct iwl_mvm_sta, sta_id));
if (iwl_mvm_has_new_tx_api(mvm))
return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff);
if (internal)
return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk);
return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk);
}
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