/*
* iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
*
* Handles the actual data of the Rx packet from the fw
*/
int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct ieee80211_hdr *hdr;
struct ieee80211_rx_status *rx_status;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
struct ieee80211_sta *sta;
struct sk_buff *skb;
u32 len;
u32 ampdu_status;
u32 rate_n_flags;
u32 rx_pkt_status;
u8 crypt_len = 0;
phy_info = &mvm->last_phy_info;
rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
len = le16_to_cpu(rx_res->byte_count);
rx_pkt_status = le32_to_cpup((__le32 *)
(pkt->data + sizeof(*rx_res) + len));
/* Dont use dev_alloc_skb(), we'll have enough headroom once
* ieee80211_hdr pulled.
*/
skb = alloc_skb(128, GFP_ATOMIC);
if (!skb) {
IWL_ERR(mvm, "alloc_skb failed\n");
return 0;
}
rx_status = IEEE80211_SKB_RXCB(skb);
/*
* drop the packet if it has failed being decrypted by HW
*/
if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
&crypt_len)) {
IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
rx_pkt_status);
kfree_skb(skb);
return 0;
}
if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
phy_info->cfg_phy_cnt);
kfree_skb(skb);
return 0;
}
/*
* Keep packets with CRC errors (and with overrun) for monitor mode
* (otherwise the firmware discards them) but mark them as bad.
*/
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status->mactime = le64_to_cpu(phy_info->timestamp);
rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
rx_status->band =
(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
rx_status->freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
rx_status->band);
/*
* TSF as indicated by the fw is at INA time, but mac80211 expects the
* TSF at the beginning of the MPDU.
*/
/*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
(unsigned long long)rx_status->mactime);
rcu_read_lock();
/*
* We have tx blocked stations (with CS bit). If we heard frames from
* a blocked station on a new channel we can TX to it again.
*/
if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
sta = ieee80211_find_sta(
rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
if (sta)
iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
}
/* This is fine since we don't support multiple AP interfaces */
sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
if (sta) {
struct iwl_mvm_sta *mvmsta;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
ieee80211_is_beacon(hdr->frame_control)) {
struct iwl_fw_dbg_trigger_tlv *trig;
struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
bool trig_check;
s32 rssi;
trig = iwl_fw_dbg_get_trigger(mvm->fw,
FW_DBG_TRIGGER_RSSI);
rssi_trig = (void *)trig->data;
rssi = le32_to_cpu(rssi_trig->rssi);
trig_check =
iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
trig);
if (trig_check && rx_status->signal < rssi)
iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
}
}
rcu_read_unlock();
/* set the preamble flag if appropriate */
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
rx_status->flag |= RX_FLAG_SHORTPRE;
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
/*
* We know which subframes of an A-MPDU belong
* together since we get a single PHY response
* from the firmware for all of them
*/
rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
rx_status->ampdu_reference = mvm->ampdu_ref;
}
/* Set up the HT phy flags */
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_status->flag |= RX_FLAG_40MHZ;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
break;
}
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status->flag |= RX_FLAG_SHORT_GI;
if (rate_n_flags & RATE_HT_MCS_GF_MSK)
rx_status->flag |= RX_FLAG_HT_GF;
if (rate_n_flags & RATE_MCS_LDPC_MSK)
rx_status->flag |= RX_FLAG_LDPC;
if (rate_n_flags & RATE_MCS_HT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->flag |= RX_FLAG_HT;
rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
/*
* iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
*
* Handles the actual data of the Rx packet from the fw
*/
void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb)
{
struct ieee80211_hdr *hdr;
struct ieee80211_rx_status *rx_status;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
struct ieee80211_sta *sta = NULL;
struct sk_buff *skb;
u32 len;
u32 rate_n_flags;
u32 rx_pkt_status;
u8 crypt_len = 0;
bool take_ref;
phy_info = &mvm->last_phy_info;
rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
len = le16_to_cpu(rx_res->byte_count);
rx_pkt_status = le32_to_cpup((__le32 *)
(pkt->data + sizeof(*rx_res) + len));
/* Dont use dev_alloc_skb(), we'll have enough headroom once
* ieee80211_hdr pulled.
*/
skb = alloc_skb(128, GFP_ATOMIC);
if (!skb) {
IWL_ERR(mvm, "alloc_skb failed\n");
return;
}
rx_status = IEEE80211_SKB_RXCB(skb);
/*
* drop the packet if it has failed being decrypted by HW
*/
if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
&crypt_len)) {
IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
rx_pkt_status);
kfree_skb(skb);
return;
}
/*
* Keep packets with CRC errors (and with overrun) for monitor mode
* (otherwise the firmware discards them) but mark them as bad.
*/
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status->mactime = le64_to_cpu(phy_info->timestamp);
rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
rx_status->band =
(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
rx_status->freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
rx_status->band);
/* TSF as indicated by the firmware is at INA time */
rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
(unsigned long long)rx_status->mactime);
rcu_read_lock();
if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
if (IS_ERR(sta))
sta = NULL;
}
} else if (!is_multicast_ether_addr(hdr->addr2)) {
/*
* iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
*
* Handles the actual data of the Rx packet from the fw
*/
int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct ieee80211_hdr *hdr;
struct ieee80211_rx_status rx_status = {};
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
u32 len;
u32 ampdu_status;
u32 rate_n_flags;
u32 rx_pkt_status;
phy_info = &mvm->last_phy_info;
rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
len = le16_to_cpu(rx_res->byte_count);
rx_pkt_status = le32_to_cpup((__le32 *)
(pkt->data + sizeof(*rx_res) + len));
memset(&rx_status, 0, sizeof(rx_status));
/*
* drop the packet if it has failed being decrypted by HW
*/
if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) {
IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
rx_pkt_status);
return 0;
}
if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
phy_info->cfg_phy_cnt);
return 0;
}
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
return 0;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status.mactime = le64_to_cpu(phy_info->timestamp);
rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp);
rx_status.band =
(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
rx_status.freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
rx_status.band);
/*
* TSF as indicated by the fw is at INA time, but mac80211 expects the
* TSF at the beginning of the MPDU.
*/
/*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
/* Find max signal strength (dBm) among 3 antenna/receiver chains */
rx_status.signal = iwl_mvm_calc_rssi(mvm, phy_info);
IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal,
(unsigned long long)rx_status.mactime);
/*
* "antenna number"
*
* It seems that the antenna field in the phy flags value
* is actually a bit field. This is undefined by radiotap,
* it wants an actual antenna number but I always get "7"
* for most legacy frames I receive indicating that the
* same frame was received on all three RX chains.
*
* I think this field should be removed in favor of a
* new 802.11n radiotap field "RX chains" that is defined
* as a bitmask.
*/
rx_status.antenna = (le16_to_cpu(phy_info->phy_flags) &
RX_RES_PHY_FLAGS_ANTENNA)
>> RX_RES_PHY_FLAGS_ANTENNA_POS;
/* set the preamble flag if appropriate */
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
rx_status.flag |= RX_FLAG_SHORTPRE;
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
/*
* We know which subframes of an A-MPDU belong
* together since we get a single PHY response
* from the firmware for all of them
*/
rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
rx_status.ampdu_reference = mvm->ampdu_ref;
}
/* Set up the HT phy flags */
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_status.flag |= RX_FLAG_40MHZ;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_status.flag |= RX_FLAG_80MHZ;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_status.flag |= RX_FLAG_160MHZ;
break;
}
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status.flag |= RX_FLAG_SHORT_GI;
if (rate_n_flags & RATE_HT_MCS_GF_MSK)
rx_status.flag |= RX_FLAG_HT_GF;
if (rate_n_flags & RATE_MCS_HT_MSK) {
rx_status.flag |= RX_FLAG_HT;
rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
rx_status.vht_nss =
((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
RATE_VHT_MCS_NSS_POS) + 1;
rx_status.rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
rx_status.flag |= RX_FLAG_VHT;
} else {
/*
* iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
*
* Handles the actual data of the Rx packet from the fw
*/
int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct ieee80211_hdr *hdr;
struct ieee80211_rx_status rx_status = {};
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
u32 len;
u32 ampdu_status;
u32 rate_n_flags;
u32 rx_pkt_status;
phy_info = &mvm->last_phy_info;
rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
len = le16_to_cpu(rx_res->byte_count);
rx_pkt_status = le32_to_cpup((__le32 *)
(pkt->data + sizeof(*rx_res) + len));
memset(&rx_status, 0, sizeof(rx_status));
/*
* drop the packet if it has failed being decrypted by HW
*/
if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) {
IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
rx_pkt_status);
return 0;
}
if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
phy_info->cfg_phy_cnt);
return 0;
}
/*
* Keep packets with CRC errors (and with overrun) for monitor mode
* (otherwise the firmware discards them) but mark them as bad.
*/
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status.mactime = le64_to_cpu(phy_info->timestamp);
rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp);
rx_status.band =
(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
rx_status.freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
rx_status.band);
/*
* TSF as indicated by the fw is at INA time, but mac80211 expects the
* TSF at the beginning of the MPDU.
*/
/*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_RX_ENERGY_API)
iwl_mvm_get_signal_strength(mvm, phy_info, &rx_status);
else
iwl_mvm_calc_rssi(mvm, phy_info, &rx_status);
IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal,
(unsigned long long)rx_status.mactime);
/* set the preamble flag if appropriate */
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
rx_status.flag |= RX_FLAG_SHORTPRE;
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
/*
* We know which subframes of an A-MPDU belong
* together since we get a single PHY response
* from the firmware for all of them
*/
rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
rx_status.ampdu_reference = mvm->ampdu_ref;
}
/* Set up the HT phy flags */
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_status.flag |= RX_FLAG_40MHZ;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_status.flag |= RX_FLAG_80MHZ;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_status.flag |= RX_FLAG_160MHZ;
break;
}
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status.flag |= RX_FLAG_SHORT_GI;
if (rate_n_flags & RATE_HT_MCS_GF_MSK)
rx_status.flag |= RX_FLAG_HT_GF;
if (rate_n_flags & RATE_MCS_HT_MSK) {
rx_status.flag |= RX_FLAG_HT;
rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
rx_status.vht_nss =
((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
RATE_VHT_MCS_NSS_POS) + 1;
rx_status.rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
rx_status.flag |= RX_FLAG_VHT;
} else {
/* Called for REPLY_RX (legacy ABG frames), or
* REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
void iwl_rx_reply_rx(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct ieee80211_hdr *header;
struct ieee80211_rx_status rx_status;
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl_rx_phy_res *phy_res;
__le32 rx_pkt_status;
struct iwl4965_rx_mpdu_res_start *amsdu;
u32 len;
u32 ampdu_status;
u16 fc;
u32 rate_n_flags;
/**
* REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
* REPLY_RX: physical layer info is in this buffer
* REPLY_RX_MPDU_CMD: physical layer info was sent in separate
* command and cached in priv->last_phy_res
*
* Here we set up local variables depending on which command is
* received.
*/
if (pkt->hdr.cmd == REPLY_RX) {
phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
+ phy_res->cfg_phy_cnt);
len = le16_to_cpu(phy_res->byte_count);
rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
phy_res->cfg_phy_cnt + len);
ampdu_status = le32_to_cpu(rx_pkt_status);
} else {
if (!priv->last_phy_res[0]) {
IWL_ERR(priv, "MPDU frame without cached PHY data\n");
return;
}
phy_res = (struct iwl_rx_phy_res *)&priv->last_phy_res[1];
amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
len = le16_to_cpu(amsdu->byte_count);
rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
ampdu_status = iwl_translate_rx_status(priv,
le32_to_cpu(rx_pkt_status));
}
if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
phy_res->cfg_phy_cnt);
return;
}
if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
!(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
le32_to_cpu(rx_pkt_status));
return;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status.mactime = le64_to_cpu(phy_res->timestamp);
rx_status.freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel));
rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
rx_status.rate_idx =
iwl_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
rx_status.flag = 0;
/* TSF isn't reliable. In order to allow smooth user experience,
* this W/A doesn't propagate it to the mac80211 */
/*rx_status.flag |= RX_FLAG_TSFT;*/
priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
/* Find max signal strength (dBm) among 3 antenna/receiver chains */
rx_status.signal = iwl_calc_rssi(priv, phy_res);
/* Meaningful noise values are available only from beacon statistics,
* which are gathered only when associated, and indicate noise
* only for the associated network channel ...
* Ignore these noise values while scanning (other channels) */
if (iwl_is_associated(priv) &&
!test_bit(STATUS_SCANNING, &priv->status)) {
rx_status.noise = priv->last_rx_noise;
rx_status.qual = iwl_calc_sig_qual(rx_status.signal,
rx_status.noise);
} else {
rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
rx_status.qual = iwl_calc_sig_qual(rx_status.signal, 0);
}
/* Reset beacon noise level if not associated. */
if (!iwl_is_associated(priv))
priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
#ifdef CONFIG_IWLWIFI_DEBUG
/* Set "1" to report good data frames in groups of 100 */
if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX))
iwl_dbg_report_frame(priv, phy_res, len, header, 1);
#endif
iwl_dbg_log_rx_data_frame(priv, len, header);
IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, noise %d, qual %d, TSF %llu\n",
rx_status.signal, rx_status.noise, rx_status.qual,
(unsigned long long)rx_status.mactime);
/*
* "antenna number"
*
* It seems that the antenna field in the phy flags value
* is actually a bit field. This is undefined by radiotap,
* it wants an actual antenna number but I always get "7"
* for most legacy frames I receive indicating that the
* same frame was received on all three RX chains.
*
* I think this field should be removed in favor of a
* new 802.11n radiotap field "RX chains" that is defined
* as a bitmask.
*/
rx_status.antenna =
(le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
>> RX_RES_PHY_FLAGS_ANTENNA_POS;
/* set the preamble flag if appropriate */
if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
rx_status.flag |= RX_FLAG_SHORTPRE;
/* Set up the HT phy flags */
if (rate_n_flags & RATE_MCS_HT_MSK)
rx_status.flag |= RX_FLAG_HT;
if (rate_n_flags & RATE_MCS_HT40_MSK)
rx_status.flag |= RX_FLAG_40MHZ;
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status.flag |= RX_FLAG_SHORT_GI;
if (iwl_is_network_packet(priv, header)) {
priv->last_rx_rssi = rx_status.signal;
priv->last_beacon_time = priv->ucode_beacon_time;
priv->last_tsf = le64_to_cpu(phy_res->timestamp);
}
fc = le16_to_cpu(header->frame_control);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_MGMT:
case IEEE80211_FTYPE_DATA:
if (priv->iw_mode == NL80211_IFTYPE_AP)
iwl_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
header->addr2);
/* fall through */
default:
iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
rxb, &rx_status);
break;
}
}
