void mt76_remove_hdr_pad(struct sk_buff *skb)
{
int len = ieee80211_get_hdrlen_from_skb(skb);
memmove(skb->data + 2, skb->data, len);
skb_pull(skb, 2);
}
static void mt76x02u_remove_dma_hdr(struct sk_buff *skb)
{
int hdr_len;
skb_pull(skb, sizeof(struct mt76x02_txwi) + MT_DMA_HDR_LEN);
hdr_len = ieee80211_get_hdrlen_from_skb(skb);
if (hdr_len % 4)
mt76x02_remove_hdr_pad(skb, 2);
}
static int mt7601u_skb_rooms(struct mt7601u_dev *dev, struct sk_buff *skb)
{
int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
u32 need_head;
need_head = sizeof(struct mt76_txwi) + 4;
if (hdr_len % 4)
need_head += 2;
return skb_cow(skb, need_head);
}
void mt76x02_remove_hdr_pad(struct sk_buff *skb, int len)
{
int hdrlen;
if (!len)
return;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
memmove(skb->data + len, skb->data, hdrlen);
skb_pull(skb, len);
}
void rt2x00crypto_tx_copy_iv(struct sk_buff *skb, unsigned int iv_len)
{
struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
unsigned int header_length = ieee80211_get_hdrlen_from_skb(skb);
if (unlikely(!iv_len))
return;
/* Copy IV/EIV data */
memcpy(skbdesc->iv, skb->data + header_length, iv_len);
}
static void mt7601u_tx_skb_remove_dma_overhead(struct sk_buff *skb,
struct ieee80211_tx_info *info)
{
int pkt_len = (unsigned long)info->status.status_driver_data[0];
skb_pull(skb, sizeof(struct mt76_txwi) + 4);
if (ieee80211_get_hdrlen_from_skb(skb) % 4)
mt76_remove_hdr_pad(skb);
skb_trim(skb, pkt_len);
}
int mt76x02_insert_hdr_pad(struct sk_buff *skb)
{
int len = ieee80211_get_hdrlen_from_skb(skb);
if (len % 4 == 0)
return 0;
skb_push(skb, 2);
memmove(skb->data, skb->data + 2, len);
skb->data[len] = 0;
skb->data[len + 1] = 0;
return 2;
}
void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
struct sk_buff *skb,
struct ath_rx_status *rx_stats,
struct ieee80211_rx_status *rxs,
bool decrypt_error)
{
struct ath_hw *ah = common->ah;
struct ieee80211_hdr *hdr;
int hdrlen, padpos, padsize;
u8 keyix;
__le16 fc;
/* see if any padding is done by the hw and remove it */
hdr = (struct ieee80211_hdr *) skb->data;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
fc = hdr->frame_control;
padpos = ieee80211_hdrlen(fc);
/* The MAC header is padded to have 32-bit boundary if the
* packet payload is non-zero. The general calculation for
* padsize would take into account odd header lengths:
* padsize = (4 - padpos % 4) % 4; However, since only
* even-length headers are used, padding can only be 0 or 2
* bytes and we can optimize this a bit. In addition, we must
* not try to remove padding from short control frames that do
* not have payload. */
padsize = padpos & 3;
if (padsize && skb->len>=padpos+padsize+FCS_LEN) {
memmove(skb->data + padsize, skb->data, padpos);
skb_pull(skb, padsize);
}
keyix = rx_stats->rs_keyix;
if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error &&
ieee80211_has_protected(fc)) {
rxs->flag |= RX_FLAG_DECRYPTED;
} else if (ieee80211_has_protected(fc)
&& !decrypt_error && skb->len >= hdrlen + 4) {
keyix = skb->data[hdrlen + 3] >> 6;
if (test_bit(keyix, common->keymap))
rxs->flag |= RX_FLAG_DECRYPTED;
}
int mt76_insert_hdr_pad(struct sk_buff *skb)
{
int len = ieee80211_get_hdrlen_from_skb(skb);
int ret;
if (len % 4 == 0)
return 0;
if (skb_headroom(skb) < 2 &&
(ret = pskb_expand_head(skb, 2, 0, GFP_ATOMIC)) != 0)
return ret;
skb_push(skb, 2);
memmove(skb->data, skb->data + 2, len);
skb->data[len] = 0;
skb->data[len + 1] = 0;
return 2;
}
void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, unsigned int iv_len)
{
struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
unsigned int header_length = ieee80211_get_hdrlen_from_skb(skb);
if (unlikely(!iv_len))
return;
/* Copy IV/EIV data */
memcpy(skbdesc->iv, skb->data + header_length, iv_len);
/* Move ieee80211 header */
memmove(skb->data + iv_len, skb->data, header_length);
/* Pull buffer to correct size */
skb_pull(skb, iv_len);
/* IV/EIV data has officially be stripped */
skbdesc->flags |= FRAME_DESC_IV_STRIPPED;
}
void rt2x00crypto_tx_insert_iv(struct sk_buff *skb)
{
struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
unsigned int header_length = ieee80211_get_hdrlen_from_skb(skb);
const unsigned int iv_len =
((!!(skbdesc->iv[0])) * 4) + ((!!(skbdesc->iv[1])) * 4);
if (!(skbdesc->flags & FRAME_DESC_IV_STRIPPED))
return;
skb_push(skb, iv_len);
/* Move ieee80211 header */
memmove(skb->data, skb->data + iv_len, header_length);
/* Copy IV/EIV data */
memcpy(skb->data + header_length, skbdesc->iv, iv_len);
/* IV/EIV data has returned into the frame */
skbdesc->flags &= ~FRAME_DESC_IV_STRIPPED;
}
void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
struct txentry_desc *txdesc)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
__set_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags);
txdesc->cipher = rt2x00crypto_key_to_cipher(hw_key);
if (hw_key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
__set_bit(ENTRY_TXD_ENCRYPT_PAIRWISE, &txdesc->flags);
txdesc->key_idx = hw_key->hw_key_idx;
txdesc->iv_offset = ieee80211_get_hdrlen_from_skb(entry->skb);
if (!(hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
__set_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc->flags);
if (!(hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC))
__set_bit(ENTRY_TXD_ENCRYPT_MMIC, &txdesc->flags);
}
/*should call before software enc*/
u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
__le16 fc = rtl_get_fc(skb);
u16 ether_type;
u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
const struct iphdr *ip;
if (!ieee80211_is_data(fc))
return false;
ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
SNAP_SIZE + PROTOC_TYPE_SIZE);
ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
/* ether_type = ntohs(ether_type); */
if (ETH_P_IP == ether_type) {
if (IPPROTO_UDP == ip->protocol) {
struct udphdr *udp = (struct udphdr *)((u8 *) ip +
(ip->ihl << 2));
if (((((u8 *) udp)[1] == 68) &&
(((u8 *) udp)[3] == 67)) ||
((((u8 *) udp)[1] == 67) &&
(((u8 *) udp)[3] == 68))) {
/*
* 68 : UDP BOOTP client
* 67 : UDP BOOTP server
*/
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
DBG_DMESG, "dhcp %s !!\n",
is_tx ? "Tx" : "Rx");
if (is_tx) {
schedule_work(&rtlpriv->
works.lps_leave_work);
ppsc->last_delaylps_stamp_jiffies =
jiffies;
}
return true;
}
}
} else if (ETH_P_ARP == ether_type) {
if (is_tx) {
schedule_work(&rtlpriv->works.lps_leave_work);
ppsc->last_delaylps_stamp_jiffies = jiffies;
}
return true;
} else if (ETH_P_PAE == ether_type) {
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
"802.1X %s EAPOL pkt!!\n", is_tx ? "Tx" : "Rx");
if (is_tx) {
schedule_work(&rtlpriv->works.lps_leave_work);
ppsc->last_delaylps_stamp_jiffies = jiffies;
}
return true;
} else if (ETH_P_IPV6 == ether_type) {
/* IPv6 */
return true;
}
return false;
}
void rt2x00lib_rxdone(struct queue_entry *entry)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct rxdone_entry_desc rxdesc;
struct sk_buff *skb;
struct ieee80211_rx_status *rx_status;
unsigned int header_length;
int rate_idx;
if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
goto submit_entry;
if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
goto submit_entry;
/*
* Allocate a new sk_buffer. If no new buffer available, drop the
* received frame and reuse the existing buffer.
*/
skb = rt2x00queue_alloc_rxskb(entry);
if (!skb)
goto submit_entry;
/*
* Unmap the skb.
*/
rt2x00queue_unmap_skb(entry);
/*
* Extract the RXD details.
*/
memset(&rxdesc, 0, sizeof(rxdesc));
rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
/*
* Check for valid size in case we get corrupted descriptor from
* hardware.
*/
if (unlikely(rxdesc.size == 0 ||
rxdesc.size > entry->queue->data_size)) {
WARNING(rt2x00dev, "Wrong frame size %d max %d.\n",
rxdesc.size, entry->queue->data_size);
dev_kfree_skb(entry->skb);
goto renew_skb;
}
/*
* The data behind the ieee80211 header must be
* aligned on a 4 byte boundary.
*/
header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
/*
* Hardware might have stripped the IV/EIV/ICV data,
* in that case it is possible that the data was
* provided separately (through hardware descriptor)
* in which case we should reinsert the data into the frame.
*/
if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
(rxdesc.flags & RX_FLAG_IV_STRIPPED))
rt2x00crypto_rx_insert_iv(entry->skb, header_length,
&rxdesc);
else if (header_length &&
(rxdesc.size > header_length) &&
(rxdesc.dev_flags & RXDONE_L2PAD))
rt2x00queue_remove_l2pad(entry->skb, header_length);
/* Trim buffer to correct size */
skb_trim(entry->skb, rxdesc.size);
/*
* Translate the signal to the correct bitrate index.
*/
rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
if (rxdesc.rate_mode == RATE_MODE_HT_MIX ||
rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD)
rxdesc.flags |= RX_FLAG_HT;
/*
* Check if this is a beacon, and more frames have been
* buffered while we were in powersaving mode.
*/
rt2x00lib_rxdone_check_ps(rt2x00dev, entry->skb, &rxdesc);
/*
* Update extra components
*/
rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
/*
* Initialize RX status information, and send frame
* to mac80211.
*/
rx_status = IEEE80211_SKB_RXCB(entry->skb);
rx_status->mactime = rxdesc.timestamp;
rx_status->band = rt2x00dev->curr_band;
rx_status->freq = rt2x00dev->curr_freq;
rx_status->rate_idx = rate_idx;
rx_status->signal = rxdesc.rssi;
rx_status->flag = rxdesc.flags;
rx_status->antenna = rt2x00dev->link.ant.active.rx;
ieee80211_rx_ni(rt2x00dev->hw, entry->skb);
renew_skb:
/*
* Replace the skb with the freshly allocated one.
*/
entry->skb = skb;
submit_entry:
entry->flags = 0;
rt2x00queue_index_inc(entry, Q_INDEX_DONE);
if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
rt2x00dev->ops->lib->clear_entry(entry);
}
void rt2x00lib_txdone(struct queue_entry *entry,
struct txdone_entry_desc *txdesc)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
unsigned int header_length, i;
u8 rate_idx, rate_flags, retry_rates;
u8 skbdesc_flags = skbdesc->flags;
bool success;
/*
* Unmap the skb.
*/
rt2x00queue_unmap_skb(entry);
/*
* Remove the extra tx headroom from the skb.
*/
skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom);
/*
* Signal that the TX descriptor is no longer in the skb.
*/
skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;
/*
* Determine the length of 802.11 header.
*/
header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
/*
* Remove L2 padding which was added during
*/
if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags))
rt2x00queue_remove_l2pad(entry->skb, header_length);
/*
* If the IV/EIV data was stripped from the frame before it was
* passed to the hardware, we should now reinsert it again because
* mac80211 will expect the same data to be present it the
* frame as it was passed to us.
*/
if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags))
rt2x00crypto_tx_insert_iv(entry->skb, header_length);
/*
* Send frame to debugfs immediately, after this call is completed
* we are going to overwrite the skb->cb array.
*/
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
/*
* Determine if the frame has been successfully transmitted.
*/
success =
test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
test_bit(TXDONE_UNKNOWN, &txdesc->flags);
/*
* Update TX statistics.
*/
rt2x00dev->link.qual.tx_success += success;
rt2x00dev->link.qual.tx_failed += !success;
rate_idx = skbdesc->tx_rate_idx;
rate_flags = skbdesc->tx_rate_flags;
retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ?
(txdesc->retry + 1) : 1;
/*
* Initialize TX status
*/
memset(&tx_info->status, 0, sizeof(tx_info->status));
tx_info->status.ack_signal = 0;
/*
* Frame was send with retries, hardware tried
* different rates to send out the frame, at each
* retry it lowered the rate 1 step except when the
* lowest rate was used.
*/
for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) {
tx_info->status.rates[i].idx = rate_idx - i;
tx_info->status.rates[i].flags = rate_flags;
if (rate_idx - i == 0) {
/*
* The lowest rate (index 0) was used until the
* number of max retries was reached.
*/
tx_info->status.rates[i].count = retry_rates - i;
i++;
break;
}
tx_info->status.rates[i].count = 1;
}
if (i < (IEEE80211_TX_MAX_RATES - 1))
tx_info->status.rates[i].idx = -1; /* terminate */
if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
if (success)
tx_info->flags |= IEEE80211_TX_STAT_ACK;
else
rt2x00dev->low_level_stats.dot11ACKFailureCount++;
}
/*
* Every single frame has it's own tx status, hence report
* every frame as ampdu of size 1.
*
* TODO: if we can find out how many frames were aggregated
* by the hw we could provide the real ampdu_len to mac80211
* which would allow the rc algorithm to better decide on
* which rates are suitable.
*/
if (test_bit(TXDONE_AMPDU, &txdesc->flags) ||
tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
tx_info->flags |= IEEE80211_TX_STAT_AMPDU;
tx_info->status.ampdu_len = 1;
tx_info->status.ampdu_ack_len = success ? 1 : 0;
if (!success)
tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
}
if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
if (success)
rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
else
rt2x00dev->low_level_stats.dot11RTSFailureCount++;
}
/*
* Only send the status report to mac80211 when it's a frame
* that originated in mac80211. If this was a extra frame coming
* through a mac80211 library call (RTS/CTS) then we should not
* send the status report back.
*/
if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) {
if (test_bit(REQUIRE_TASKLET_CONTEXT, &rt2x00dev->cap_flags))
ieee80211_tx_status(rt2x00dev->hw, entry->skb);
else
ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb);
} else
dev_kfree_skb_any(entry->skb);
/*
* Make this entry available for reuse.
*/
entry->skb = NULL;
entry->flags = 0;
rt2x00dev->ops->lib->clear_entry(entry);
rt2x00queue_index_inc(entry, Q_INDEX_DONE);
/*
* If the data queue was below the threshold before the txdone
* handler we must make sure the packet queue in the mac80211 stack
* is reenabled when the txdone handler has finished. This has to be
* serialized with rt2x00mac_tx(), otherwise we can wake up queue
* before it was stopped.
*/
spin_lock_bh(&entry->queue->tx_lock);
if (!rt2x00queue_threshold(entry->queue))
rt2x00queue_unpause_queue(entry->queue);
spin_unlock_bh(&entry->queue->tx_lock);
}
void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
struct queue_entry *entry)
{
struct rxdone_entry_desc rxdesc;
struct sk_buff *skb;
struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
unsigned int header_length;
int rate_idx;
/*
* Allocate a new sk_buffer. If no new buffer available, drop the
* received frame and reuse the existing buffer.
*/
skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
if (!skb)
return;
/*
* Unmap the skb.
*/
rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
/*
* Extract the RXD details.
*/
memset(&rxdesc, 0, sizeof(rxdesc));
rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
/* Trim buffer to correct size */
skb_trim(entry->skb, rxdesc.size);
/*
* The data behind the ieee80211 header must be
* aligned on a 4 byte boundary.
*/
header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
/*
* Hardware might have stripped the IV/EIV/ICV data,
* in that case it is possible that the data was
* provided seperately (through hardware descriptor)
* in which case we should reinsert the data into the frame.
*/
if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
(rxdesc.flags & RX_FLAG_IV_STRIPPED))
rt2x00crypto_rx_insert_iv(entry->skb, header_length,
&rxdesc);
else if (rxdesc.dev_flags & RXDONE_L2PAD)
rt2x00queue_remove_l2pad(entry->skb, header_length);
else
rt2x00queue_align_payload(entry->skb, header_length);
/*
* Check if the frame was received using HT. In that case,
* the rate is the MCS index and should be passed to mac80211
* directly. Otherwise we need to translate the signal to
* the correct bitrate index.
*/
if (rxdesc.rate_mode == RATE_MODE_CCK ||
rxdesc.rate_mode == RATE_MODE_OFDM) {
rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
} else {
rxdesc.flags |= RX_FLAG_HT;
rate_idx = rxdesc.signal;
}
/*
* Update extra components
*/
rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
rx_status->mactime = rxdesc.timestamp;
rx_status->rate_idx = rate_idx;
rx_status->signal = rxdesc.rssi;
rx_status->noise = rxdesc.noise;
rx_status->flag = rxdesc.flags;
rx_status->antenna = rt2x00dev->link.ant.active.rx;
/*
* Send frame to mac80211 & debugfs.
* mac80211 will clean up the skb structure.
*/
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
/*
* Replace the skb with the freshly allocated one.
*/
entry->skb = skb;
entry->flags = 0;
rt2x00dev->ops->lib->clear_entry(entry);
rt2x00queue_index_inc(entry->queue, Q_INDEX);
}
void rt2x00lib_txdone(struct queue_entry *entry,
struct txdone_entry_desc *txdesc)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
u8 rate_idx, rate_flags, retry_rates;
u8 skbdesc_flags = skbdesc->flags;
unsigned int i;
bool success;
/*
* Unmap the skb.
*/
rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
/*
* Remove L2 padding which was added during
*/
if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
rt2x00queue_remove_l2pad(entry->skb, header_length);
/*
* If the IV/EIV data was stripped from the frame before it was
* passed to the hardware, we should now reinsert it again because
* mac80211 will expect the the same data to be present it the
* frame as it was passed to us.
*/
if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
rt2x00crypto_tx_insert_iv(entry->skb, header_length);
/*
* Send frame to debugfs immediately, after this call is completed
* we are going to overwrite the skb->cb array.
*/
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
/*
* Determine if the frame has been successfully transmitted.
*/
success =
test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
test_bit(TXDONE_UNKNOWN, &txdesc->flags) ||
test_bit(TXDONE_FALLBACK, &txdesc->flags);
/*
* Update TX statistics.
*/
rt2x00dev->link.qual.tx_success += success;
rt2x00dev->link.qual.tx_failed += !success;
rate_idx = skbdesc->tx_rate_idx;
rate_flags = skbdesc->tx_rate_flags;
retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ?
(txdesc->retry + 1) : 1;
/*
* Initialize TX status
*/
memset(&tx_info->status, 0, sizeof(tx_info->status));
tx_info->status.ack_signal = 0;
/*
* Frame was send with retries, hardware tried
* different rates to send out the frame, at each
* retry it lowered the rate 1 step.
*/
for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) {
tx_info->status.rates[i].idx = rate_idx - i;
tx_info->status.rates[i].flags = rate_flags;
tx_info->status.rates[i].count = 1;
}
if (i < (IEEE80211_TX_MAX_RATES - 1))
tx_info->status.rates[i].idx = -1; /* terminate */
if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
if (success)
tx_info->flags |= IEEE80211_TX_STAT_ACK;
else
rt2x00dev->low_level_stats.dot11ACKFailureCount++;
}
if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
if (success)
rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
else
rt2x00dev->low_level_stats.dot11RTSFailureCount++;
}
/*
* Only send the status report to mac80211 when it's a frame
* that originated in mac80211. If this was a extra frame coming
* through a mac80211 library call (RTS/CTS) then we should not
* send the status report back.
*/
if (!(skbdesc_flags & SKBDESC_NOT_MAC80211))
ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
else
dev_kfree_skb_irq(entry->skb);
/*
* Make this entry available for reuse.
*/
entry->skb = NULL;
entry->flags = 0;
rt2x00dev->ops->lib->clear_entry(entry);
clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
/*
* If the data queue was below the threshold before the txdone
* handler we must make sure the packet queue in the mac80211 stack
* is reenabled when the txdone handler has finished.
*/
if (!rt2x00queue_threshold(entry->queue))
ieee80211_wake_queue(rt2x00dev->hw, qid);
}
int vnt_generate_fifo_header(struct vnt_private *priv, u32 dma_idx,
struct vnt_tx_desc *head_td, struct sk_buff *skb)
{
struct vnt_td_info *td_info = head_td->td_info;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
struct ieee80211_rate *rate;
struct ieee80211_key_conf *tx_key;
struct ieee80211_hdr *hdr;
struct vnt_tx_fifo_head *tx_buffer_head =
(struct vnt_tx_fifo_head *)td_info->buf;
u16 tx_body_size = skb->len, current_rate;
u8 pkt_type;
bool is_pspoll = false;
memset(tx_buffer_head, 0, sizeof(*tx_buffer_head));
hdr = (struct ieee80211_hdr *)(skb->data);
rate = ieee80211_get_tx_rate(priv->hw, info);
current_rate = rate->hw_value;
if (priv->wCurrentRate != current_rate &&
!(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
priv->wCurrentRate = current_rate;
RFbSetPower(priv, priv->wCurrentRate,
priv->hw->conf.chandef.chan->hw_value);
}
if (current_rate > RATE_11M) {
if (info->band == NL80211_BAND_5GHZ) {
pkt_type = PK_TYPE_11A;
} else {
if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
pkt_type = PK_TYPE_11GB;
else
pkt_type = PK_TYPE_11GA;
}
} else {
pkt_type = PK_TYPE_11B;
}
/*Set fifo controls */
if (pkt_type == PK_TYPE_11A)
tx_buffer_head->fifo_ctl = 0;
else if (pkt_type == PK_TYPE_11B)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
else if (pkt_type == PK_TYPE_11GB)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
else if (pkt_type == PK_TYPE_11GA)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
/* generate interrupt */
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT);
if (!ieee80211_is_data(hdr->frame_control)) {
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_ISDMA0);
tx_buffer_head->time_stamp =
cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
} else {
tx_buffer_head->time_stamp =
cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
}
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
if (ieee80211_has_retry(hdr->frame_control))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
priv->byPreambleType = PREAMBLE_SHORT;
else
priv->byPreambleType = PREAMBLE_LONG;
if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
if (ieee80211_has_a4(hdr->frame_control)) {
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
priv->bLongHeader = true;
}
if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
is_pspoll = true;
tx_buffer_head->frag_ctl =
cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
if (info->control.hw_key) {
tx_key = info->control.hw_key;
switch (info->control.hw_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
break;
case WLAN_CIPHER_SUITE_CCMP:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
default:
break;
}
}
tx_buffer_head->current_rate = cpu_to_le16(current_rate);
/* legacy rates TODO use ieee80211_tx_rate */
if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
if (priv->byAutoFBCtrl == AUTO_FB_0)
tx_buffer_head->fifo_ctl |=
cpu_to_le16(FIFOCTL_AUTO_FB_0);
else if (priv->byAutoFBCtrl == AUTO_FB_1)
tx_buffer_head->fifo_ctl |=
cpu_to_le16(FIFOCTL_AUTO_FB_1);
}
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
s_cbFillTxBufHead(priv, pkt_type, (u8 *)tx_buffer_head,
dma_idx, head_td, is_pspoll);
if (info->control.hw_key) {
tx_key = info->control.hw_key;
if (tx_key->keylen > 0)
vnt_fill_txkey(hdr, tx_buffer_head->tx_key,
tx_key, skb, tx_body_size, td_info->mic_hdr);
}
return 0;
}
static void vnt_fill_txkey(struct ieee80211_hdr *hdr, u8 *key_buffer,
struct ieee80211_key_conf *tx_key,
struct sk_buff *skb, u16 payload_len,
struct vnt_mic_hdr *mic_hdr)
{
u64 pn64;
u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
/* strip header and icv len from payload */
payload_len -= ieee80211_get_hdrlen_from_skb(skb);
payload_len -= tx_key->icv_len;
switch (tx_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
memcpy(key_buffer, iv, 3);
memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
memcpy(key_buffer + 8, iv, 3);
memcpy(key_buffer + 11,
tx_key->key, WLAN_KEY_LEN_WEP40);
}
break;
case WLAN_CIPHER_SUITE_TKIP:
ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
break;
case WLAN_CIPHER_SUITE_CCMP:
if (!mic_hdr)
return;
mic_hdr->id = 0x59;
mic_hdr->payload_len = cpu_to_be16(payload_len);
ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
pn64 = atomic64_read(&tx_key->tx_pn);
mic_hdr->ccmp_pn[5] = pn64;
mic_hdr->ccmp_pn[4] = pn64 >> 8;
mic_hdr->ccmp_pn[3] = pn64 >> 16;
mic_hdr->ccmp_pn[2] = pn64 >> 24;
mic_hdr->ccmp_pn[1] = pn64 >> 32;
mic_hdr->ccmp_pn[0] = pn64 >> 40;
if (ieee80211_has_a4(hdr->frame_control))
mic_hdr->hlen = cpu_to_be16(28);
else
mic_hdr->hlen = cpu_to_be16(22);
ether_addr_copy(mic_hdr->addr1, hdr->addr1);
ether_addr_copy(mic_hdr->addr2, hdr->addr2);
ether_addr_copy(mic_hdr->addr3, hdr->addr3);
mic_hdr->frame_control = cpu_to_le16(
le16_to_cpu(hdr->frame_control) & 0xc78f);
mic_hdr->seq_ctrl = cpu_to_le16(
le16_to_cpu(hdr->seq_ctrl) & 0xf);
if (ieee80211_has_a4(hdr->frame_control))
ether_addr_copy(mic_hdr->addr4, hdr->addr4);
memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
break;
default:
break;
}
}
static unsigned int
s_cbFillTxBufHead(struct vnt_private *pDevice, unsigned char byPktType,
unsigned char *pbyTxBufferAddr,
unsigned int uDMAIdx, struct vnt_tx_desc *pHeadTD,
unsigned int is_pspoll)
{
struct vnt_td_info *td_info = pHeadTD->td_info;
struct sk_buff *skb = td_info->skb;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct vnt_tx_fifo_head *tx_buffer_head =
(struct vnt_tx_fifo_head *)td_info->buf;
u16 fifo_ctl = le16_to_cpu(tx_buffer_head->fifo_ctl);
unsigned int cbFrameSize;
__le16 uDuration;
unsigned char *pbyBuffer;
unsigned int uLength = 0;
unsigned int cbMICHDR = 0;
unsigned int uMACfragNum = 1;
unsigned int uPadding = 0;
unsigned int cbReqCount = 0;
bool bNeedACK = (bool)(fifo_ctl & FIFOCTL_NEEDACK);
bool bRTS = (bool)(fifo_ctl & FIFOCTL_RTS);
struct vnt_tx_desc *ptdCurr;
unsigned int cbHeaderLength = 0;
void *pvRrvTime;
struct vnt_mic_hdr *pMICHDR;
void *pvRTS;
void *pvCTS;
void *pvTxDataHd;
unsigned short wTxBufSize; /* FFinfo size */
unsigned char byFBOption = AUTO_FB_NONE;
pvRrvTime = pMICHDR = pvRTS = pvCTS = pvTxDataHd = NULL;
cbFrameSize = skb->len + 4;
if (info->control.hw_key) {
switch (info->control.hw_key->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
cbMICHDR = sizeof(struct vnt_mic_hdr);
default:
break;
}
cbFrameSize += info->control.hw_key->icv_len;
if (pDevice->byLocalID > REV_ID_VT3253_A1) {
/* MAC Header should be padding 0 to DW alignment. */
uPadding = 4 - (ieee80211_get_hdrlen_from_skb(skb) % 4);
uPadding %= 4;
}
}
/*
* Use for AUTO FALL BACK
*/
if (fifo_ctl & FIFOCTL_AUTO_FB_0)
byFBOption = AUTO_FB_0;
else if (fifo_ctl & FIFOCTL_AUTO_FB_1)
byFBOption = AUTO_FB_1;
/* Set RrvTime/RTS/CTS Buffer */
wTxBufSize = sizeof(struct vnt_tx_fifo_head);
if (byPktType == PK_TYPE_11GB || byPktType == PK_TYPE_11GA) {/* 802.11g packet */
if (byFBOption == AUTO_FB_NONE) {
if (bRTS) {/* RTS_need */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts));
pvRTS = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) + cbMICHDR);
pvCTS = NULL;
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) +
cbMICHDR + sizeof(struct vnt_rts_g));
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_rts) +
cbMICHDR + sizeof(struct vnt_rts_g) +
sizeof(struct vnt_tx_datahead_g);
} else { /* RTS_needless */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts));
pvRTS = NULL;
pvCTS = (void *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts) + cbMICHDR);
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize +
sizeof(struct vnt_rrv_time_cts) + cbMICHDR + sizeof(struct vnt_cts));
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_cts) +
cbMICHDR + sizeof(struct vnt_cts) + sizeof(struct vnt_tx_datahead_g);
}
} else {
/* Auto Fall Back */
if (bRTS) {/* RTS_need */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts));
pvRTS = (void *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) + cbMICHDR);
pvCTS = NULL;
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) +
cbMICHDR + sizeof(struct vnt_rts_g_fb));
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_rts) +
cbMICHDR + sizeof(struct vnt_rts_g_fb) + sizeof(struct vnt_tx_datahead_g_fb);
} else { /* RTS_needless */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts));
pvRTS = NULL;
pvCTS = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts) + cbMICHDR);
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts) +
cbMICHDR + sizeof(struct vnt_cts_fb));
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_cts) +
cbMICHDR + sizeof(struct vnt_cts_fb) + sizeof(struct vnt_tx_datahead_g_fb);
}
} /* Auto Fall Back */
} else {/* 802.11a/b packet */
if (byFBOption == AUTO_FB_NONE) {
if (bRTS) {
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab));
pvRTS = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab) + cbMICHDR);
pvCTS = NULL;
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize +
sizeof(struct vnt_rrv_time_ab) + cbMICHDR + sizeof(struct vnt_rts_ab));
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_ab) +
cbMICHDR + sizeof(struct vnt_rts_ab) + sizeof(struct vnt_tx_datahead_ab);
} else { /* RTS_needless, need MICHDR */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab));
pvRTS = NULL;
pvCTS = NULL;
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab) + cbMICHDR);
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_ab) +
cbMICHDR + sizeof(struct vnt_tx_datahead_ab);
}
} else {
/* Auto Fall Back */
if (bRTS) { /* RTS_need */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab));
pvRTS = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab) + cbMICHDR);
pvCTS = NULL;
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize +
sizeof(struct vnt_rrv_time_ab) + cbMICHDR + sizeof(struct vnt_rts_a_fb));
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_ab) +
cbMICHDR + sizeof(struct vnt_rts_a_fb) + sizeof(struct vnt_tx_datahead_a_fb);
} else { /* RTS_needless */
pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
pMICHDR = (struct vnt_mic_hdr *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab));
pvRTS = NULL;
pvCTS = NULL;
pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_ab) + cbMICHDR);
cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_ab) +
cbMICHDR + sizeof(struct vnt_tx_datahead_a_fb);
}
} /* Auto Fall Back */
}
td_info->mic_hdr = pMICHDR;
memset((void *)(pbyTxBufferAddr + wTxBufSize), 0, (cbHeaderLength - wTxBufSize));
/* Fill FIFO,RrvTime,RTS,and CTS */
s_vGenerateTxParameter(pDevice, byPktType, tx_buffer_head, pvRrvTime, pvRTS, pvCTS,
cbFrameSize, bNeedACK, uDMAIdx, hdr, pDevice->wCurrentRate);
/* Fill DataHead */
uDuration = s_uFillDataHead(pDevice, byPktType, pvTxDataHd, cbFrameSize, uDMAIdx, bNeedACK,
0, 0, uMACfragNum, byFBOption, pDevice->wCurrentRate, is_pspoll);
hdr->duration_id = uDuration;
cbReqCount = cbHeaderLength + uPadding + skb->len;
pbyBuffer = (unsigned char *)pHeadTD->td_info->buf;
uLength = cbHeaderLength + uPadding;
/* Copy the Packet into a tx Buffer */
memcpy((pbyBuffer + uLength), skb->data, skb->len);
ptdCurr = pHeadTD;
ptdCurr->td_info->req_count = (u16)cbReqCount;
return cbHeaderLength;
}
void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
struct queue_entry *entry)
{
struct rxdone_entry_desc rxdesc;
struct sk_buff *skb;
struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
struct ieee80211_supported_band *sband;
struct ieee80211_hdr *hdr;
const struct rt2x00_rate *rate;
unsigned int header_size;
unsigned int align;
unsigned int i;
int idx = -1;
/*
* Allocate a new sk_buffer. If no new buffer available, drop the
* received frame and reuse the existing buffer.
*/
skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
if (!skb)
return;
/*
* Unmap the skb.
*/
rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
/*
* Extract the RXD details.
*/
memset(&rxdesc, 0, sizeof(rxdesc));
rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
/*
* The data behind the ieee80211 header must be
* aligned on a 4 byte boundary.
*/
header_size = ieee80211_get_hdrlen_from_skb(entry->skb);
align = ((unsigned long)(entry->skb->data + header_size)) & 3;
if (align) {
skb_push(entry->skb, align);
/* Move entire frame in 1 command */
memmove(entry->skb->data, entry->skb->data + align,
rxdesc.size);
}
/* Update data pointers, trim buffer to correct size */
skb_trim(entry->skb, rxdesc.size);
/*
* Update RX statistics.
*/
sband = &rt2x00dev->bands[rt2x00dev->curr_band];
for (i = 0; i < sband->n_bitrates; i++) {
rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
(rate->plcp == rxdesc.signal)) ||
(!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
(rate->bitrate == rxdesc.signal))) {
idx = i;
break;
}
}
if (idx < 0) {
WARNING(rt2x00dev, "Frame received with unrecognized signal,"
"signal=0x%.2x, plcp=%d.\n", rxdesc.signal,
!!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP));
idx = 0;
}
/*
* Only update link status if this is a beacon frame carrying our bssid.
*/
hdr = (struct ieee80211_hdr *)entry->skb->data;
if (ieee80211_is_beacon(hdr->frame_control) &&
(rxdesc.dev_flags & RXDONE_MY_BSS))
rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc.rssi);
rt2x00dev->link.qual.rx_success++;
rx_status->mactime = rxdesc.timestamp;
rx_status->rate_idx = idx;
rx_status->qual =
rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc.rssi);
rx_status->signal = rxdesc.rssi;
rx_status->flag = rxdesc.flags;
rx_status->antenna = rt2x00dev->link.ant.active.rx;
/*
* Send frame to mac80211 & debugfs.
* mac80211 will clean up the skb structure.
*/
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
/*
* Replace the skb with the freshly allocated one.
*/
entry->skb = skb;
entry->flags = 0;
rt2x00dev->ops->lib->init_rxentry(rt2x00dev, entry);
rt2x00queue_index_inc(entry->queue, Q_INDEX);
}
static void ar5523_data_rx_cb(struct urb *urb)
{
struct ar5523_rx_data *data = urb->context;
struct ar5523 *ar = data->ar;
struct ar5523_rx_desc *desc;
struct ar5523_chunk *chunk;
struct ieee80211_hw *hw = ar->hw;
struct ieee80211_rx_status *rx_status;
u32 rxlen;
int usblen = urb->actual_length;
int hdrlen, pad;
ar5523_dbg(ar, "%s\n", __func__);
/* sync/async unlink faults aren't errors */
if (urb->status) {
if (urb->status != -ESHUTDOWN)
ar5523_err(ar, "%s: USB err: %d\n", __func__,
urb->status);
goto skip;
}
if (usblen < AR5523_MIN_RXBUFSZ) {
ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
goto skip;
}
chunk = (struct ar5523_chunk *) data->skb->data;
if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
chunk->seqnum != 0) {
ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
chunk->seqnum, chunk->flags,
be16_to_cpu(chunk->length));
goto skip;
}
/* Rx descriptor is located at the end, 32-bit aligned */
desc = (struct ar5523_rx_desc *)
(data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
rxlen = be32_to_cpu(desc->len);
if (rxlen > ar->rxbufsz) {
ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
be32_to_cpu(desc->len));
goto skip;
}
if (!rxlen) {
ar5523_dbg(ar, "RX: rxlen is 0\n");
goto skip;
}
if (be32_to_cpu(desc->status) != 0) {
ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
be32_to_cpu(desc->status), be32_to_cpu(desc->len));
goto skip;
}
skb_reserve(data->skb, sizeof(*chunk));
skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
if (!IS_ALIGNED(hdrlen, 4)) {
ar5523_dbg(ar, "eek, alignment workaround activated\n");
pad = ALIGN(hdrlen, 4) - hdrlen;
memmove(data->skb->data + pad, data->skb->data, hdrlen);
skb_pull(data->skb, pad);
skb_put(data->skb, pad);
}
rx_status = IEEE80211_SKB_RXCB(data->skb);
memset(rx_status, 0, sizeof(*rx_status));
rx_status->freq = be32_to_cpu(desc->channel);
rx_status->band = hw->conf.chandef.chan->band;
rx_status->signal = -95 + be32_to_cpu(desc->rssi);
ieee80211_rx_irqsafe(hw, data->skb);
data->skb = NULL;
skip:
if (data->skb) {
dev_kfree_skb_irq(data->skb);
data->skb = NULL;
}
ar5523_rx_data_put(ar, data);
if (atomic_inc_return(&ar->rx_data_free_cnt) >=
AR5523_RX_DATA_REFILL_COUNT &&
test_bit(AR5523_HW_UP, &ar->flags))
queue_work(ar->wq, &ar->rx_refill_work);
}
static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
struct ath9k_htc_rxbuf *rxbuf,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_hdr *hdr;
struct ieee80211_hw *hw = priv->hw;
struct sk_buff *skb = rxbuf->skb;
struct ath_common *common = ath9k_hw_common(priv->ah);
struct ath_htc_rx_status *rxstatus;
int hdrlen, padpos, padsize;
int last_rssi = ATH_RSSI_DUMMY_MARKER;
__le16 fc;
if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) {
ath_print(common, ATH_DBG_FATAL,
"Corrupted RX frame, dropping\n");
goto rx_next;
}
rxstatus = (struct ath_htc_rx_status *)skb->data;
if (be16_to_cpu(rxstatus->rs_datalen) -
(skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Corrupted RX data len, dropping "
"(dlen: %d, skblen: %d)\n",
rxstatus->rs_datalen, skb->len);
goto rx_next;
}
/* Get the RX status information */
memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
padpos = ath9k_cmn_padpos(fc);
padsize = padpos & 3;
if (padsize && skb->len >= padpos+padsize+FCS_LEN) {
memmove(skb->data + padsize, skb->data, padpos);
skb_pull(skb, padsize);
}
memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
if (rxbuf->rxstatus.rs_status != 0) {
if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
goto rx_next;
if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
/* FIXME */
} else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
if (ieee80211_is_ctl(fc))
/*
* Sometimes, we get invalid
* MIC failures on valid control frames.
* Remove these mic errors.
*/
rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
else
rx_status->flag |= RX_FLAG_MMIC_ERROR;
}
/*
* Reject error frames with the exception of
* decryption and MIC failures. For monitor mode,
* we also ignore the CRC error.
*/
if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
if (rxbuf->rxstatus.rs_status &
~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
ATH9K_RXERR_CRC))
goto rx_next;
} else {
if (rxbuf->rxstatus.rs_status &
~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
goto rx_next;
}
}
}
if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) {
u8 keyix;
keyix = rxbuf->rxstatus.rs_keyix;
if (keyix != ATH9K_RXKEYIX_INVALID) {
rx_status->flag |= RX_FLAG_DECRYPTED;
} else if (ieee80211_has_protected(fc) &&
skb->len >= hdrlen + 4) {
keyix = skb->data[hdrlen + 3] >> 6;
if (test_bit(keyix, common->keymap))
rx_status->flag |= RX_FLAG_DECRYPTED;
}
static void rt2x00usb_interrupt_rxdone(struct urb *urb)
{
struct queue_entry *entry = (struct queue_entry *)urb->context;
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct sk_buff *skb;
struct skb_frame_desc *skbdesc;
struct rxdone_entry_desc rxdesc;
int header_size;
if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return;
/*
* Check if the received data is simply too small
* to be actually valid, or if the urb is signaling
* a problem.
*/
if (urb->actual_length < entry->queue->desc_size || urb->status)
goto skip_entry;
/*
* Fill in skb descriptor
*/
skbdesc = get_skb_frame_desc(entry->skb);
memset(skbdesc, 0, sizeof(*skbdesc));
skbdesc->entry = entry;
memset(&rxdesc, 0, sizeof(rxdesc));
rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
/*
* The data behind the ieee80211 header must be
* aligned on a 4 byte boundary.
*/
header_size = ieee80211_get_hdrlen_from_skb(entry->skb);
if (header_size % 4 == 0) {
skb_push(entry->skb, 2);
memmove(entry->skb->data, entry->skb->data + 2,
entry->skb->len - 2);
skbdesc->data = entry->skb->data;
skb_trim(entry->skb,entry->skb->len - 2);
}
/*
* Allocate a new sk buffer to replace the current one.
* If allocation fails, we should drop the current frame
* so we can recycle the existing sk buffer for the new frame.
*/
skb = rt2x00usb_alloc_rxskb(entry->queue);
if (!skb)
goto skip_entry;
/*
* Send the frame to rt2x00lib for further processing.
*/
rt2x00lib_rxdone(entry, &rxdesc);
/*
* Replace current entry's skb with the newly allocated one,
* and reinitialize the urb.
*/
entry->skb = skb;
urb->transfer_buffer = entry->skb->data;
urb->transfer_buffer_length = entry->skb->len;
skip_entry:
if (test_bit(DEVICE_ENABLED_RADIO, &entry->queue->rt2x00dev->flags)) {
__set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
usb_submit_urb(urb, GFP_ATOMIC);
}
rt2x00queue_index_inc(entry->queue, Q_INDEX);
}
/*should call before software enc*/
u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
u16 fc = le16_to_cpu(hdr->frame_control);
u16 ether_type;
u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
const struct iphdr *ip;
if (!ieee80211_is_data(fc))
goto end;
if (ieee80211_is_nullfunc(fc))
return true;
ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
SNAP_SIZE + PROTOC_TYPE_SIZE);
ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
ether_type = ntohs(ether_type);
if (ETH_P_IP == ether_type) {
if (IPPROTO_UDP == ip->protocol) {
struct udphdr *udp = (struct udphdr *)((u8 *) ip +
(ip->ihl << 2));
if (((((u8 *) udp)[1] == 68) &&
(((u8 *) udp)[3] == 67)) ||
((((u8 *) udp)[1] == 67) &&
(((u8 *) udp)[3] == 68))) {
/*
* 68 : UDP BOOTP client
* 67 : UDP BOOTP server
*/
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
DBG_DMESG, ("dhcp %s !!\n",
(is_tx) ? "Tx" : "Rx"));
if (is_tx) {
rtl_lps_leave(hw);
ppsc->last_delaylps_stamp_jiffies =
jiffies;
}
return true;
}
}
} else if (ETH_P_ARP == ether_type) {
if (is_tx) {
rtl_lps_leave(hw);
ppsc->last_delaylps_stamp_jiffies = jiffies;
}
return true;
} else if (ETH_P_PAE == ether_type) {
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
if (is_tx) {
rtl_lps_leave(hw);
ppsc->last_delaylps_stamp_jiffies = jiffies;
}
return true;
} else if (0x86DD == ether_type) {
return true;
}
end:
return false;
}
static void wl18xx_tx_complete_packet(struct wl1271 *wl, u8 tx_stat_byte)
{
struct ieee80211_tx_info *info;
struct sk_buff *skb;
int id = tx_stat_byte & WL18XX_TX_STATUS_DESC_ID_MASK;
bool tx_success;
/* check for id legality */
if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
wl1271_warning("illegal id in tx completion: %d", id);
return;
}
/* a zero bit indicates Tx success */
tx_success = !(tx_stat_byte & BIT(WL18XX_TX_STATUS_STAT_BIT_IDX));
skb = wl->tx_frames[id];
info = IEEE80211_SKB_CB(skb);
if (wl12xx_is_dummy_packet(wl, skb)) {
wl1271_free_tx_id(wl, id);
return;
}
/* update the TX status info */
if (tx_success && !(info->flags & IEEE80211_TX_CTL_NO_ACK))
info->flags |= IEEE80211_TX_STAT_ACK;
/*
* first pass info->control.vif while it's valid, and then fill out
* the info->status structures
*/
wl18xx_get_last_tx_rate(wl, info->control.vif, &info->status.rates[0]);
info->status.rates[0].count = 1; /* no data about retries */
info->status.ack_signal = -1;
if (!tx_success)
wl->stats.retry_count++;
/*
* TODO: update sequence number for encryption? seems to be
* unsupported for now. needed for recovery with encryption.
*/
/* remove private header from packet */
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
/* remove TKIP header space if present */
if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
info->control.hw_key &&
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, hdrlen);
skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
}
wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p success %d",
id, skb, tx_success);
/* return the packet to the stack */
skb_queue_tail(&wl->deferred_tx_queue, skb);
queue_work(wl->freezable_wq, &wl->netstack_work);
wl1271_free_tx_id(wl, id);
}