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iwlwifi: mvm: add Tx A-MSDU inside A-MPDU

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If the peer allows, we can have A-MSDU inside A-MDPU.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Emmanuel Grumbach 2015-10-26 16:00:29 +02:00
parent a6d5e32f24
commit bb81bb68f4
4 changed files with 38 additions and 12 deletions
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4
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
View File

@ -847,6 +847,7 @@ static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
u16 tid = params->tid;
u16 *ssn = &params->ssn;
u8 buf_size = params->buf_size;
bool amsdu = params->amsdu;
IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
sta->addr, tid, action);
@ -907,7 +908,8 @@ static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
buf_size, amsdu);
break;
default:
WARN_ON_ONCE(1);

4
drivers/net/wireless/intel/iwlwifi/mvm/sta.c
View File

@ -1031,7 +1031,8 @@ int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
}
int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u8 buf_size)
struct ieee80211_sta *sta, u16 tid, u8 buf_size,
bool amsdu)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
@ -1051,6 +1052,7 @@ int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
tid_data->state = IWL_AGG_ON;
mvmsta->agg_tids |= BIT(tid);
tid_data->ssn = 0xffff;
tid_data->amsdu_in_ampdu_allowed = amsdu;
spin_unlock_bh(&mvmsta->lock);
fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];

5
drivers/net/wireless/intel/iwlwifi/mvm/sta.h
View File

@ -260,6 +260,7 @@ enum iwl_mvm_agg_state {
* Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA).
* @reduced_tpc: Reduced tx power. Holds the data between the
* Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA).
* @amsdu_in_ampdu_allowed: true if A-MSDU in A-MPDU is allowed.
* @state: state of the BA agreement establishment / tear down.
* @txq_id: Tx queue used by the BA session
* @ssn: the first packet to be sent in AGG HW queue in Tx AGG start flow, or
@ -274,6 +275,7 @@ struct iwl_mvm_tid_data {
/* The rest is Tx AGG related */
u32 rate_n_flags;
u8 reduced_tpc;
bool amsdu_in_ampdu_allowed;
enum iwl_mvm_agg_state state;
u16 txq_id;
u16 ssn;
@ -405,7 +407,8 @@ int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn);
int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u8 buf_size);
struct ieee80211_sta *sta, u16 tid, u8 buf_size,
bool amsdu);
int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid);
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,

37
drivers/net/wireless/intel/iwlwifi/mvm/tx.c
View File

@ -438,19 +438,26 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_sta *sta,
struct sk_buff_head *mpdus_skb)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (void *)skb->data;
unsigned int mss = skb_shinfo(skb)->gso_size;
struct sk_buff *tmp, *next;
char cb[sizeof(skb->cb)];
unsigned int num_subframes, tcp_payload_len, subf_len;
unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
bool ipv4 = (skb->protocol == htons(ETH_P_IP));
u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
u16 amsdu_add, snap_ip_tcp, pad, i = 0;
u8 *qc, tid;
snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
tcp_hdrlen(skb);
qc = ieee80211_get_qos_ctl(hdr);
tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
return -EINVAL;
if (!sta->max_amsdu_len ||
!ieee80211_is_data_qos(hdr->frame_control)) {
num_subframes = 1;
@ -458,13 +465,28 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
goto segment;
}
/* TODO: for now, disable A-MSDU inside AMPDU */
if (info->flags & IEEE80211_TX_CTL_AMPDU) {
/*
* No need to lock amsdu_in_ampdu_allowed since it can't be modified
* during an BA session.
*/
if (info->flags & IEEE80211_TX_CTL_AMPDU &&
!mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
num_subframes = 1;
pad = 0;
goto segment;
}
max_amsdu_len = sta->max_amsdu_len;
/*
* Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
* supported. This is a spec requirement (IEEE 802.11-2015
* section 8.7.3 NOTE 3).
*/
if (info->flags & IEEE80211_TX_CTL_AMPDU &&
!sta->vht_cap.vht_supported)
max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
/* Sub frame header + SNAP + IP header + TCP header + MSS */
subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
pad = (4 - subf_len) & 0x3;
@ -473,12 +495,9 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
* If we have N subframes in the A-MSDU, then the A-MSDU's size is
* N * subf_len + (N - 1) * pad.
*/
num_subframes = (sta->max_amsdu_len + pad) / (subf_len + pad);
if (num_subframes > 1) {
u8 *qc = ieee80211_get_qos_ctl((void *)skb->data);
num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
if (num_subframes > 1)
*qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
}
tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
tcp_hdrlen(skb) + skb->data_len;
@ -555,7 +574,7 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
skb_shinfo(tmp)->gso_size = mss;
} else {
u8 *qc = ieee80211_get_qos_ctl((void *)tmp->data);
qc = ieee80211_get_qos_ctl((void *)tmp->data);
if (ipv4)
ip_send_check(ip_hdr(tmp));