/* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
struct napi_struct *napi,
struct sk_buff *skb, int queue,
struct ieee80211_sta *sta)
{
if (iwl_mvm_check_pn(mvm, skb, queue, sta))
kfree_skb(skb);
else
ieee80211_rx_napi(mvm->hw, skb, napi);
}
/*
* 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_sta *sta,
struct napi_struct *napi,
struct sk_buff *skb,
struct ieee80211_hdr *hdr, u16 len,
u8 crypt_len,
struct iwl_rx_cmd_buffer *rxb)
{
unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
unsigned int fraglen;
/*
* The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
* but those are all multiples of 4 long) all goes away, but we
* want the *end* of it, which is going to be the start of the IP
* header, to be aligned when it gets pulled in.
* The beginning of the skb->data is aligned on at least a 4-byte
* boundary after allocation. Everything here is aligned at least
* on a 2-byte boundary so we can just take hdrlen & 3 and pad by
* the result.
*/
skb_reserve(skb, hdrlen & 3);
/* If frame is small enough to fit in skb->head, pull it completely.
* If not, only pull ieee80211_hdr (including crypto if present, and
* an additional 8 bytes for SNAP/ethertype, see below) so that
* splice() or TCP coalesce are more efficient.
*
* Since, in addition, ieee80211_data_to_8023() always pull in at
* least 8 bytes (possibly more for mesh) we can do the same here
* to save the cost of doing it later. That still doesn't pull in
* the actual IP header since the typical case has a SNAP header.
* If the latter changes (there are efforts in the standards group
* to do so) we should revisit this and ieee80211_data_to_8023().
*/
hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
skb_put_data(skb, 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);
}
ieee80211_rx_napi(mvm->hw, sta, skb, napi);
}
void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames,
struct napi_struct *napi)
{
struct ieee80211_sta *sta;
struct sk_buff *skb;
spin_lock(&dev->rx_lock);
while ((skb = __skb_dequeue(frames)) != NULL) {
if (mt76_check_ccmp_pn(skb)) {
dev_kfree_skb(skb);
continue;
}
sta = mt76_rx_convert(skb);
ieee80211_rx_napi(dev->hw, sta, skb, napi);
}
spin_unlock(&dev->rx_lock);
}
/*
* 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 napi_struct *napi,
struct sk_buff *skb,
struct ieee80211_hdr *hdr, u16 len,
u32 ampdu_status, u8 crypt_len,
struct iwl_rx_cmd_buffer *rxb)
{
unsigned int hdrlen, fraglen;
/* If frame is small enough to fit in skb->head, pull it completely.
* If not, only pull ieee80211_hdr (including crypto if present, and
* an additional 8 bytes for SNAP/ethertype, see below) so that
* splice() or TCP coalesce are more efficient.
*
* Since, in addition, ieee80211_data_to_8023() always pull in at
* least 8 bytes (possibly more for mesh) we can do the same here
* to save the cost of doing it later. That still doesn't pull in
* the actual IP header since the typical case has a SNAP header.
* If the latter changes (there are efforts in the standards group
* to do so) we should revisit this and ieee80211_data_to_8023().
*/
hdrlen = (len <= skb_tailroom(skb)) ? len :
sizeof(*hdr) + crypt_len + 8;
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);
}
ieee80211_rx_napi(mvm->hw, NULL, skb, napi);
}
