static void mt7601u_rx_process_seg(struct mt7601u_dev *dev, u8 *data,
u32 seg_len, struct page *p)
{
struct sk_buff *skb;
struct mt7601u_rxwi *rxwi;
u32 fce_info, truesize = seg_len;
/* DMA_INFO field at the beginning of the segment contains only some of
* the information, we need to read the FCE descriptor from the end.
*/
fce_info = get_unaligned_le32(data + seg_len - MT_FCE_INFO_LEN);
seg_len -= MT_FCE_INFO_LEN;
data += MT_DMA_HDR_LEN;
seg_len -= MT_DMA_HDR_LEN;
rxwi = (struct mt7601u_rxwi *) data;
data += sizeof(struct mt7601u_rxwi);
seg_len -= sizeof(struct mt7601u_rxwi);
if (unlikely(rxwi->zero[0] || rxwi->zero[1] || rxwi->zero[2]))
dev_err_once(dev->dev, "Error: RXWI zero fields are set\n");
if (unlikely(MT76_GET(MT_RXD_INFO_TYPE, fce_info)))
dev_err_once(dev->dev, "Error: RX path seen a non-pkt urb\n");
trace_mt_rx(dev, rxwi, fce_info);
skb = mt7601u_rx_skb_from_seg(dev, rxwi, data, seg_len, truesize, p);
if (!skb)
return;
ieee80211_rx_ni(dev->hw, skb);
}
int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
{
struct ieee80211_rx_status status;
struct ieee80211_hdr *hdr;
struct wcn36xx_rx_bd *bd;
u16 fc, sn;
/*
* All fields must be 0, otherwise it can lead to
* unexpected consequences.
*/
memset(&status, 0, sizeof(status));
bd = (struct wcn36xx_rx_bd *)skb->data;
buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
skb_pull(skb, bd->pdu.mpdu_header_off);
status.mactime = 10;
status.freq = wcn->current_channel->center_freq;
status.band = wcn->current_channel->band;
status.signal = -RSSI0(bd);
status.antenna = 1;
status.rate_idx = 1;
status.flag = 0;
status.rx_flags = 0;
status.flag |= RX_FLAG_IV_STRIPPED |
RX_FLAG_MMIC_STRIPPED |
RX_FLAG_DECRYPTED;
wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x "
"status->vendor_radiotap_len=%x",
status.flag, status.vendor_radiotap_len);
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
hdr = (struct ieee80211_hdr *) skb->data;
fc = __le16_to_cpu(hdr->frame_control);
sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
if (ieee80211_is_beacon(hdr->frame_control)) {
wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d",
skb, skb->len, fc, sn);
wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
(char *)skb->data, skb->len);
} else {
wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d",
skb, skb->len, fc, sn);
wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
(char *)skb->data, skb->len);
}
ieee80211_rx_ni(wcn->hw, skb);
return 0;
}
static void wl1251_rx_body(struct wl1251 *wl,
struct wl1251_rx_descriptor *desc)
{
struct sk_buff *skb;
struct ieee80211_rx_status status;
u8 *rx_buffer, beacon = 0;
u16 length, *fc;
u32 curr_id, last_id_inc, rx_packet_ring_addr;
length = WL1251_RX_ALIGN(desc->length - PLCP_HEADER_LENGTH);
curr_id = (desc->flags & RX_DESC_SEQNUM_MASK) >> RX_DESC_PACKETID_SHIFT;
last_id_inc = (wl->rx_last_id + 1) % (RX_MAX_PACKET_ID + 1);
if (last_id_inc != curr_id) {
wl1251_warning("curr ID:%d, last ID inc:%d",
curr_id, last_id_inc);
wl->rx_last_id = curr_id;
} else {
wl->rx_last_id = last_id_inc;
}
rx_packet_ring_addr = wl->data_path->rx_packet_ring_addr +
sizeof(struct wl1251_rx_descriptor) + 20;
if (wl->rx_current_buffer)
rx_packet_ring_addr += wl->data_path->rx_packet_ring_chunk_size;
skb = __dev_alloc_skb(length, GFP_KERNEL);
if (!skb) {
wl1251_error("Couldn't allocate RX frame");
return;
}
rx_buffer = skb_put(skb, length);
wl1251_mem_read(wl, rx_packet_ring_addr, rx_buffer, length);
/* The actual length doesn't include the target's alignment */
skb_trim(skb, desc->length - PLCP_HEADER_LENGTH);
fc = (u16 *)skb->data;
if ((*fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON)
beacon = 1;
wl1251_rx_status(wl, desc, &status, beacon);
wl1251_debug(DEBUG_RX, "rx skb 0x%p: %d B %s", skb, skb->len,
beacon ? "beacon" : "");
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
ieee80211_rx_ni(wl->hw, skb);
wl1251_update_rate(wl, length);
}
static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length)
{
struct wl1271_rx_descriptor *desc;
struct sk_buff *skb;
u16 *fc;
u8 *buf;
u8 beacon = 0;
/*
* In PLT mode we seem to get frames and mac80211 warns about them,
* workaround this by not retrieving them at all.
*/
if (unlikely(wl->state == WL1271_STATE_PLT))
return -EINVAL;
skb = __dev_alloc_skb(length, GFP_KERNEL);
if (!skb) {
wl1271_error("Couldn't allocate RX frame");
return -ENOMEM;
}
buf = skb_put(skb, length);
memcpy(buf, data, length);
/* the data read starts with the descriptor */
desc = (struct wl1271_rx_descriptor *) buf;
/* now we pull the descriptor out of the buffer */
skb_pull(skb, sizeof(*desc));
fc = (u16 *)skb->data;
if ((*fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON)
beacon = 1;
wl1271_rx_status(wl, desc, IEEE80211_SKB_RXCB(skb), beacon);
wl1271_debug(DEBUG_RX, "rx skb 0x%p: %d B %s", skb, skb->len,
beacon ? "beacon" : "");
skb_trim(skb, skb->len - desc->pad_len);
ieee80211_rx_ni(wl->hw, skb);
return 0;
}
/*
* iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
*
* Adds the rxb to a new skb and give it to mac80211
*/
static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
struct ieee80211_hdr *hdr, u16 len,
u32 ampdu_status,
struct iwl_rx_cmd_buffer *rxb,
struct ieee80211_rx_status *stats)
{
struct sk_buff *skb;
unsigned int hdrlen, fraglen;
/* 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;
}
/* If frame is small enough to fit in skb->head, pull it completely.
* If not, only pull ieee80211_hdr so that splice() or TCP coalesce
* are more efficient.
*/
hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
fraglen = len - hdrlen;
if (fraglen) {
int offset = (void *)hdr + hdrlen -
rxb_addr(rxb) + rxb_offset(rxb);
skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
fraglen, rxb->truesize);
}
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
ieee80211_rx_ni(mvm->hw, skb);
}
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_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);
/*
* 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);
else
rt2x00queue_align_payload(entry->skb, header_length);
/* Trim buffer to correct size */
skb_trim(entry->skb, rxdesc.size);
/*
* 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->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));
/*
* Currently only PCI and SOC devices handle rx interrupts in process
* context. Hence, use ieee80211_rx_irqsafe for USB and ieee80211_rx_ni
* for PCI and SOC devices.
*/
if (rt2x00_is_usb(rt2x00dev))
ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
else
ieee80211_rx_ni(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);
}
