/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2015 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2015 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include "iwl-trans.h"
#include "mvm.h"
#include "fw-api.h"
static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
int queue, struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
struct iwl_mvm_key_pn *ptk_pn;
int res;
u8 tid, keyidx;
u8 pn[IEEE80211_CCMP_PN_LEN];
u8 *extiv;
/* do PN checking */
/* multicast and non-data only arrives on default queue */
if (!ieee80211_is_data(hdr->frame_control) ||
is_multicast_ether_addr(hdr->addr1))
return 0;
/* do not check PN for open AP */
if (!(stats->flag & RX_FLAG_DECRYPTED))
return 0;
/*
* avoid checking for default queue - we don't want to replicate
* all the logic that's necessary for checking the PN on fragmented
* frames, leave that to mac80211
*/
if (queue == 0)
return 0;
/* if we are here - this for sure is either CCMP or GCMP */
if (IS_ERR_OR_NULL(sta)) {
IWL_ERR(mvm,
"expected hw-decrypted unicast frame for station\n");
return -1;
}
mvmsta = iwl_mvm_sta_from_mac80211(sta);
extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
keyidx = extiv[3] >> 6;
ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
if (!ptk_pn)
return -1;
if (ieee80211_is_data_qos(hdr->frame_control))
tid = ieee80211_get_tid(hdr);
else
tid = 0;
/* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
if (tid >= IWL_MAX_TID_COUNT)
return -1;
/* load pn */
pn[0] = extiv[7];
pn[1] = extiv[6];
pn[2] = extiv[5];
pn[3] = extiv[4];
pn[4] = extiv[1];
pn[5] = extiv[0];
res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN);
if (res < 0)
return -1;
if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN))
return -1;
memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
stats->flag |= RX_FLAG_PN_VALIDATED;
return 0;
}
/* iwl_mvm_create_skb Adds the rxb to a new skb */
static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_hdr *hdr, u16 len, u8 crypt_len,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
unsigned int headlen, fraglen, pad_len = 0;
unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
len -= 2;
pad_len = 2;
}
/* 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().
*/
headlen = (len <= skb_tailroom(skb)) ? len :
hdrlen + crypt_len + 8;
/* The firmware may align the packet to DWORD.
* The padding is inserted after the IV.
* After copying the header + IV skip the padding if
* present before copying packet data.
*/
hdrlen += crypt_len;
if (WARN_ONCE(headlen < hdrlen,
"invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n",
hdrlen, len, crypt_len)) {
/*
* We warn and trace because we want to be able to see
* it in trace-cmd as well.
*/
IWL_DEBUG_RX(mvm,
"invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n",
hdrlen, len, crypt_len);
return -EINVAL;
}
skb_put_data(skb, hdr, hdrlen);
skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
fraglen = len - headlen;
if (fraglen) {
int offset = (void *)hdr + headlen + pad_len -
rxb_addr(rxb) + rxb_offset(rxb);
skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
fraglen, rxb->truesize);
}
return 0;
}
/* 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)
{
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
if (iwl_mvm_check_pn(mvm, skb, queue, sta)) {
kfree_skb(skb);
} else {
unsigned int radiotap_len = 0;
if (rx_status->flag & RX_FLAG_RADIOTAP_HE)
radiotap_len += sizeof(struct ieee80211_radiotap_he);
if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU)
radiotap_len += sizeof(struct ieee80211_radiotap_he_mu);
__skb_push(skb, radiotap_len);
ieee80211_rx_napi(mvm->hw, sta, skb, napi);
}
}
static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
struct ieee80211_rx_status *rx_status,
u32 rate_n_flags, int energy_a,
int energy_b)
{
int max_energy;
u32 rate_flags = rate_n_flags;
energy_a = energy_a ? -energy_a : S8_MIN;
energy_b = energy_b ? -energy_b : S8_MIN;
max_energy = max(energy_a, energy_b);
IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
energy_a, energy_b, max_energy);
rx_status->signal = max_energy;
rx_status->chains =
(rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
rx_status->chain_signal[0] = energy_a;
rx_status->chain_signal[1] = energy_b;
rx_status->chain_signal[2] = S8_MIN;
}
static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
struct ieee80211_rx_status *stats, u16 phy_info,
struct iwl_rx_mpdu_desc *desc,
u32 pkt_flags, int queue, u8 *crypt_len)
{
u16 status = le16_to_cpu(desc->status);
/*
* Drop UNKNOWN frames in aggregation, unless in monitor mode
* (where we don't have the keys).
* We limit this to aggregation because in TKIP this is a valid
* scenario, since we may not have the (correct) TTAK (phase 1
* key) in the firmware.
*/
if (phy_info & IWL_RX_MPDU_PHY_AMPDU &&
(status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on)
return -1;
if (!ieee80211_has_protected(hdr->frame_control) ||
(status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
IWL_RX_MPDU_STATUS_SEC_NONE)
return 0;
/* TODO: handle packets encrypted with unknown alg */
switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
case IWL_RX_MPDU_STATUS_SEC_CCM:
case IWL_RX_MPDU_STATUS_SEC_GCM:
BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
/* alg is CCM: check MIC only */
if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
return -1;
stats->flag |= RX_FLAG_DECRYPTED;
if (pkt_flags & FH_RSCSR_RADA_EN)
stats->flag |= RX_FLAG_MIC_STRIPPED;
*crypt_len = IEEE80211_CCMP_HDR_LEN;
return 0;
case IWL_RX_MPDU_STATUS_SEC_TKIP:
/* Don't drop the frame and decrypt it in SW */
if (!fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
return 0;
*crypt_len = IEEE80211_TKIP_IV_LEN;
/* fall through if TTAK OK */
case IWL_RX_MPDU_STATUS_SEC_WEP:
if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
return -1;
stats->flag |= RX_FLAG_DECRYPTED;
if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
IWL_RX_MPDU_STATUS_SEC_WEP)
*crypt_len = IEEE80211_WEP_IV_LEN;
if (pkt_flags & FH_RSCSR_RADA_EN)
stats->flag |= RX_FLAG_ICV_STRIPPED;
return 0;
case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
return -1;
stats->flag |= RX_FLAG_DECRYPTED;
return 0;
default:
/* Expected in monitor (not having the keys) */
if (!mvm->monitor_on)
IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
}
return 0;
}
static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
struct sk_buff *skb,
struct iwl_rx_mpdu_desc *desc)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
u16 flags = le16_to_cpu(desc->l3l4_flags);
u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
IWL_RX_L3_PROTO_POS);
if (mvmvif->features & NETIF_F_RXCSUM &&
flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
(flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
l3_prot == IWL_RX_L3_TYPE_IPV6 ||
l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
/*
* returns true if a packet is a duplicate and should be dropped.
* Updates AMSDU PN tracking info
*/
static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue,
struct ieee80211_rx_status *rx_status,
struct ieee80211_hdr *hdr,
struct iwl_rx_mpdu_desc *desc)
{
struct iwl_mvm_sta *mvm_sta;
struct iwl_mvm_rxq_dup_data *dup_data;
u8 tid, sub_frame_idx;
if (WARN_ON(IS_ERR_OR_NULL(sta)))
return false;
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
dup_data = &mvm_sta->dup_data[queue];
/*
* Drop duplicate 802.11 retransmissions
* (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
*/
if (ieee80211_is_ctl(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control) ||
is_multicast_ether_addr(hdr->addr1)) {
rx_status->flag |= RX_FLAG_DUP_VALIDATED;
return false;
}
if (ieee80211_is_data_qos(hdr->frame_control))
/* frame has qos control */
tid = ieee80211_get_tid(hdr);
else
tid = IWL_MAX_TID_COUNT;
/* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
sub_frame_idx = desc->amsdu_info &
IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
dup_data->last_seq[tid] == hdr->seq_ctrl &&
dup_data->last_sub_frame[tid] >= sub_frame_idx))
return true;
/* Allow same PN as the first subframe for following sub frames */
if (dup_data->last_seq[tid] == hdr->seq_ctrl &&
sub_frame_idx > dup_data->last_sub_frame[tid] &&
desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU)
rx_status->flag |= RX_FLAG_ALLOW_SAME_PN;
dup_data->last_seq[tid] = hdr->seq_ctrl;
dup_data->last_sub_frame[tid] = sub_frame_idx;
rx_status->flag |= RX_FLAG_DUP_VALIDATED;
return false;
}
int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
const u8 *data, u32 count)
{
struct iwl_rxq_sync_cmd *cmd;
u32 data_size = sizeof(*cmd) + count;
int ret;
/* should be DWORD aligned */
if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
return -EINVAL;
cmd = kzalloc(data_size, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->rxq_mask = cpu_to_le32(rxq_mask);
cmd->count = cpu_to_le32(count);
cmd->flags = 0;
memcpy(cmd->payload, data, count);
ret = iwl_mvm_send_cmd_pdu(mvm,
WIDE_ID(DATA_PATH_GROUP,
TRIGGER_RX_QUEUES_NOTIF_CMD),
0, data_size, cmd);
kfree(cmd);
return ret;
}
/*
* Returns true if sn2 - buffer_size < sn1 < sn2.
* To be used only in order to compare reorder buffer head with NSSN.
* We fully trust NSSN unless it is behind us due to reorder timeout.
* Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
*/
static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
{
return ieee80211_sn_less(sn1, sn2) &&
!ieee80211_sn_less(sn1, sn2 - buffer_size);
}
#define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
struct napi_struct *napi,
struct iwl_mvm_baid_data *baid_data,
struct iwl_mvm_reorder_buffer *reorder_buf,
u16 nssn)
{
struct iwl_mvm_reorder_buf_entry *entries =
&baid_data->entries[reorder_buf->queue *
baid_data->entries_per_queue];
u16 ssn = reorder_buf->head_sn;
lockdep_assert_held(&reorder_buf->lock);
/* ignore nssn smaller than head sn - this can happen due to timeout */
if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
goto set_timer;
while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
int index = ssn % reorder_buf->buf_size;
struct sk_buff_head *skb_list = &entries[index].e.frames;
struct sk_buff *skb;
ssn = ieee80211_sn_inc(ssn);
/*
* Empty the list. Will have more than one frame for A-MSDU.
* Empty list is valid as well since nssn indicates frames were
* received.
*/
while ((skb = __skb_dequeue(skb_list))) {
iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
reorder_buf->queue,
sta);
reorder_buf->num_stored--;
}
}
reorder_buf->head_sn = nssn;
set_timer:
if (reorder_buf->num_stored && !reorder_buf->removed) {
u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
while (skb_queue_empty(&entries[index].e.frames))
index = (index + 1) % reorder_buf->buf_size;
/* modify timer to match next frame's expiration time */
mod_timer(&reorder_buf->reorder_timer,
entries[index].e.reorder_time + 1 +
RX_REORDER_BUF_TIMEOUT_MQ);
} else {
del_timer(&reorder_buf->reorder_timer);
}
}
void iwl_mvm_reorder_timer_expired(struct timer_list *t)
{
struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
struct iwl_mvm_baid_data *baid_data =
iwl_mvm_baid_data_from_reorder_buf(buf);
struct iwl_mvm_reorder_buf_entry *entries =
&baid_data->entries[buf->queue * baid_data->entries_per_queue];
int i;
u16 sn = 0, index = 0;
bool expired = false;
bool cont = false;
spin_lock(&buf->lock);
if (!buf->num_stored || buf->removed) {
spin_unlock(&buf->lock);
return;
}
for (i = 0; i < buf->buf_size ; i++) {
index = (buf->head_sn + i) % buf->buf_size;
if (skb_queue_empty(&entries[index].e.frames)) {
/*
* If there is a hole and the next frame didn't expire
* we want to break and not advance SN
*/
cont = false;
continue;
}
if (!cont &&
!time_after(jiffies, entries[index].e.reorder_time +
RX_REORDER_BUF_TIMEOUT_MQ))
break;
expired = true;
/* continue until next hole after this expired frames */
cont = true;
sn = ieee80211_sn_add(buf->head_sn, i + 1);
}
if (expired) {
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
u8 sta_id = baid_data->sta_id;
rcu_read_lock();
sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
mvmsta = iwl_mvm_sta_from_mac80211(sta);
/* SN is set to the last expired frame + 1 */
IWL_DEBUG_HT(buf->mvm,
"Releasing expired frames for sta %u, sn %d\n",
sta_id, sn);
iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
sta, baid_data->tid);
iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn);
rcu_read_unlock();
} else {
/*
* If no frame expired and there are stored frames, index is now
* pointing to the first unexpired frame - modify timer
* accordingly to this frame.
*/
mod_timer(&buf->reorder_timer,
entries[index].e.reorder_time +
1 + RX_REORDER_BUF_TIMEOUT_MQ);
}
spin_unlock(&buf->lock);
}
static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
struct iwl_mvm_delba_data *data)
{
struct iwl_mvm_baid_data *ba_data;
struct ieee80211_sta *sta;
struct iwl_mvm_reorder_buffer *reorder_buf;
u8 baid = data->baid;
if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
return;
rcu_read_lock();
ba_data = rcu_dereference(mvm->baid_map[baid]);
if (WARN_ON_ONCE(!ba_data))
goto out;
sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
goto out;
reorder_buf = &ba_data->reorder_buf[queue];
/* release all frames that are in the reorder buffer to the stack */
spin_lock_bh(&reorder_buf->lock);
iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
ieee80211_sn_add(reorder_buf->head_sn,
reorder_buf->buf_size));
spin_unlock_bh(&reorder_buf->lock);
del_timer_sync(&reorder_buf->reorder_timer);
out:
rcu_read_unlock();
}
void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
int queue)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rxq_sync_notification *notif;
struct iwl_mvm_internal_rxq_notif *internal_notif;
notif = (void *)pkt->data;
internal_notif = (void *)notif->payload;
if (internal_notif->sync &&
mvm->queue_sync_cookie != internal_notif->cookie) {
WARN_ONCE(1, "Received expired RX queue sync message\n");
return;
}
switch (internal_notif->type) {
case IWL_MVM_RXQ_EMPTY:
break;
case IWL_MVM_RXQ_NOTIF_DEL_BA:
iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
break;
default:
WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
}
if (internal_notif->sync &&
!atomic_dec_return(&mvm->queue_sync_counter))
wake_up(&mvm->rx_sync_waitq);
}
/*
* Returns true if the MPDU was buffered\dropped, false if it should be passed
* to upper layer.
*/
static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
struct napi_struct *napi,
int queue,
struct ieee80211_sta *sta,
struct sk_buff *skb,
struct iwl_rx_mpdu_desc *desc)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct iwl_mvm_sta *mvm_sta;
struct iwl_mvm_baid_data *baid_data;
struct iwl_mvm_reorder_buffer *buffer;
struct sk_buff *tail;
u32 reorder = le32_to_cpu(desc->reorder_data);
bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
bool last_subframe =
desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
u8 tid = ieee80211_get_tid(hdr);
u8 sub_frame_idx = desc->amsdu_info &
IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
struct iwl_mvm_reorder_buf_entry *entries;
int index;
u16 nssn, sn;
u8 baid;
baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
IWL_RX_MPDU_REORDER_BAID_SHIFT;
/*
* This also covers the case of receiving a Block Ack Request
* outside a BA session; we'll pass it to mac80211 and that
* then sends a delBA action frame.
*/
if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
return false;
/* no sta yet */
if (WARN_ONCE(IS_ERR_OR_NULL(sta),
"Got valid BAID without a valid station assigned\n"))
return false;
mvm_sta = iwl_mvm_sta_from_mac80211(sta);
/* not a data packet or a bar */
if (!ieee80211_is_back_req(hdr->frame_control) &&
(!ieee80211_is_data_qos(hdr->frame_control) ||
is_multicast_ether_addr(hdr->addr1)))
return false;
if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
return false;
baid_data = rcu_dereference(mvm->baid_map[baid]);
if (!baid_data) {
IWL_DEBUG_RX(mvm,
"Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
baid, reorder);
return false;
}
if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
"baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
tid))
return false;
nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
IWL_RX_MPDU_REORDER_SN_SHIFT;
buffer = &baid_data->reorder_buf[queue];
entries = &baid_data->entries[queue * baid_data->entries_per_queue];
spin_lock_bh(&buffer->lock);
if (!buffer->valid) {
if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
spin_unlock_bh(&buffer->lock);
return false;
}
buffer->valid = true;
}
if (ieee80211_is_back_req(hdr->frame_control)) {
iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
goto drop;
}
/*
* If there was a significant jump in the nssn - adjust.
* If the SN is smaller than the NSSN it might need to first go into
* the reorder buffer, in which case we just release up to it and the
* rest of the function will take care of storing it and releasing up to
* the nssn
*/
if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
buffer->buf_size) ||
!ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
min_sn);
}
/* drop any oudated packets */
if (ieee80211_sn_less(sn, buffer->head_sn))
goto drop;
/* release immediately if allowed by nssn and no stored frames */
if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
buffer->buf_size) &&
(!amsdu || last_subframe))
buffer->head_sn = nssn;
/* No need to update AMSDU last SN - we are moving the head */
spin_unlock_bh(&buffer->lock);
return false;
}
/*
* release immediately if there are no stored frames, and the sn is
* equal to the head.
* This can happen due to reorder timer, where NSSN is behind head_sn.
* When we released everything, and we got the next frame in the
* sequence, according to the NSSN we can't release immediately,
* while technically there is no hole and we can move forward.
*/
if (!buffer->num_stored && sn == buffer->head_sn) {
if (!amsdu || last_subframe)
buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
/* No need to update AMSDU last SN - we are moving the head */
spin_unlock_bh(&buffer->lock);
return false;
}
index = sn % buffer->buf_size;
/*
* Check if we already stored this frame
* As AMSDU is either received or not as whole, logic is simple:
* If we have frames in that position in the buffer and the last frame
* originated from AMSDU had a different SN then it is a retransmission.
* If it is the same SN then if the subframe index is incrementing it
* is the same AMSDU - otherwise it is a retransmission.
*/
tail = skb_peek_tail(&entries[index].e.frames);
if (tail && !amsdu)
goto drop;
else if (tail && (sn != buffer->last_amsdu ||
buffer->last_sub_index >= sub_frame_idx))
goto drop;
/* put in reorder buffer */
__skb_queue_tail(&entries[index].e.frames, skb);
buffer->num_stored++;
entries[index].e.reorder_time = jiffies;
if (amsdu) {
buffer->last_amsdu = sn;
buffer->last_sub_index = sub_frame_idx;
}
/*
* We cannot trust NSSN for AMSDU sub-frames that are not the last.
* The reason is that NSSN advances on the first sub-frame, and may
* cause the reorder buffer to advance before all the sub-frames arrive.
* Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
* SN 1. NSSN for first sub frame will be 3 with the result of driver
* releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
* already ahead and it will be dropped.
* If the last sub-frame is not on this queue - we will get frame
* release notification with up to date NSSN.
*/
if (!amsdu || last_subframe)
iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
spin_unlock_bh(&buffer->lock);
return true;
drop:
kfree_skb(skb);
spin_unlock_bh(&buffer->lock);
return true;
}
static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
u32 reorder_data, u8 baid)
{
unsigned long now = jiffies;
unsigned long timeout;
struct iwl_mvm_baid_data *data;
rcu_read_lock();
data = rcu_dereference(mvm->baid_map[baid]);
if (!data) {
IWL_DEBUG_RX(mvm,
"Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
baid, reorder_data);
goto out;
}
if (!data->timeout)
goto out;
timeout = data->timeout;
/*
* Do not update last rx all the time to avoid cache bouncing
* between the rx queues.
* Update it every timeout. Worst case is the session will
* expire after ~ 2 * timeout, which doesn't matter that much.
*/
if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
/* Update is atomic */
data->last_rx = now;
out:
rcu_read_unlock();
}
static void iwl_mvm_flip_address(u8 *addr)
{
int i;
u8 mac_addr[ETH_ALEN];
for (i = 0; i < ETH_ALEN; i++)
mac_addr[i] = addr[ETH_ALEN - i - 1];
ether_addr_copy(addr, mac_addr);
}
void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb, int queue)
{
struct ieee80211_rx_status *rx_status;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
struct ieee80211_hdr *hdr;
u32 len = le16_to_cpu(desc->mpdu_len);
u32 rate_n_flags, gp2_on_air_rise;
u16 phy_info = le16_to_cpu(desc->phy_info);
struct ieee80211_sta *sta = NULL;
struct sk_buff *skb;
u8 crypt_len = 0, channel, energy_a, energy_b;
struct ieee80211_radiotap_he *he = NULL;
struct ieee80211_radiotap_he_mu *he_mu = NULL;
u32 he_type = 0xffffffff;
/* this is invalid e.g. because puncture type doesn't allow 0b11 */
#define HE_PHY_DATA_INVAL ((u64)-1)
u64 he_phy_data = HE_PHY_DATA_INVAL;
size_t desc_size;
if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
return;
if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags);
channel = desc->v3.channel;
gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise);
energy_a = desc->v3.energy_a;
energy_b = desc->v3.energy_b;
desc_size = sizeof(*desc);
} else {
rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags);
channel = desc->v1.channel;
gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise);
energy_a = desc->v1.energy_a;
energy_b = desc->v1.energy_b;
desc_size = IWL_RX_DESC_SIZE_V1;
}
hdr = (void *)(pkt->data + desc_size);
/* 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 (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
/*
* If the device inserted padding it means that (it thought)
* the 802.11 header wasn't a multiple of 4 bytes long. In
* this case, reserve two bytes at the start of the SKB to
* align the payload properly in case we end up copying it.
*/
skb_reserve(skb, 2);
}
rx_status = IEEE80211_SKB_RXCB(skb);
if (rate_n_flags & RATE_MCS_HE_MSK) {
static const struct ieee80211_radiotap_he known = {
.data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN |
IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN),
.data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN |
IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN),
};
static const struct ieee80211_radiotap_he_mu mu_known = {
.flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN |
IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN |
IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN |
IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN),
.flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN),
};
unsigned int radiotap_len = 0;
he = skb_put_data(skb, &known, sizeof(known));
radiotap_len += sizeof(known);
rx_status->flag |= RX_FLAG_RADIOTAP_HE;
he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK;
if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) {
if (mvm->trans->cfg->device_family >=
IWL_DEVICE_FAMILY_22560)
he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
else
he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
if (he_type == RATE_MCS_HE_TYPE_MU) {
he_mu = skb_put_data(skb, &mu_known,
sizeof(mu_known));
radiotap_len += sizeof(mu_known);
rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU;
}
}
/* temporarily hide the radiotap data */
__skb_pull(skb, radiotap_len);
}
rx_status = IEEE80211_SKB_RXCB(skb);
if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc,
le32_to_cpu(pkt->len_n_flags), queue,
&crypt_len)) {
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 (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
le16_to_cpu(desc->status));
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* set the preamble flag if appropriate */
if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
u64 tsf_on_air_rise;
if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise);
else
tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise);
rx_status->mactime = tsf_on_air_rise;
/* TSF as indicated by the firmware is at INA time */
rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
} else if (he_type == RATE_MCS_HE_TYPE_SU) {
u64 he_phy_data;
if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
else
he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
he->data1 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN);
if (FIELD_GET(IWL_RX_HE_PHY_UPLINK,
he_phy_data))
he->data3 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA3_UL_DL);
if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
rx_status->ampdu_reference = mvm->ampdu_ref;
mvm->ampdu_ref++;
rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
if (FIELD_GET(IWL_RX_HE_PHY_DELIM_EOF,
he_phy_data))
rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT;
}
} else if (he_mu && he_phy_data != HE_PHY_DATA_INVAL) {
he_mu->flags1 |=
le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIBG_SYM_OR_USER_NUM_MASK,
he_phy_data),
IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS);
he_mu->flags1 |=
le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_DCM,
he_phy_data),
IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM);
he_mu->flags1 |=
le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_MCS_MASK,
he_phy_data),
IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS);
he_mu->flags2 |=
le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_COMPRESSION,
he_phy_data),
IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP);
he_mu->flags2 |=
le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_PREAMBLE_PUNC_TYPE_MASK,
he_phy_data),
IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW);
}
rx_status->device_timestamp = gp2_on_air_rise;
rx_status->band = channel > 14 ? NL80211_BAND_5GHZ :
NL80211_BAND_2GHZ;
rx_status->freq = ieee80211_channel_to_frequency(channel,
rx_status->band);
iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a,
energy_b);
/* update aggregation data for monitor sake on default queue */
if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
u64 he_phy_data;
if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
else
he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
/* toggle is switched whenever new aggregation starts */
if (toggle_bit != mvm->ampdu_toggle) {
mvm->ampdu_ref++;
mvm->ampdu_toggle = toggle_bit;
if (he_phy_data != HE_PHY_DATA_INVAL &&
he_type == RATE_MCS_HE_TYPE_MU) {
rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
if (FIELD_GET(IWL_RX_HE_PHY_DELIM_EOF,
he_phy_data))
rx_status->flag |=
RX_FLAG_AMPDU_EOF_BIT;
}
}
rx_status->ampdu_reference = mvm->ampdu_ref;
}
rcu_read_lock();
if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
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)) {
/*
* This is fine since we prevent two stations with the same
* address from being added.
*/
sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
}
if (sta) {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct ieee80211_vif *tx_blocked_vif =
rcu_dereference(mvm->csa_tx_blocked_vif);
u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
IWL_RX_MPDU_REORDER_BAID_MASK) >>
IWL_RX_MPDU_REORDER_BAID_SHIFT);
if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
!is_multicast_ether_addr(hdr->addr1) &&
ieee80211_is_data(hdr->frame_control) &&
time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
schedule_delayed_work(&mvm->tcm.work, 0);
/*
* 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(tx_blocked_vif) &&
tx_blocked_vif == mvmsta->vif) {
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(tx_blocked_vif);
if (mvmvif->csa_target_freq == rx_status->freq)
iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
false);
}
rs_update_last_rssi(mvm, mvmsta, 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->fwrt,
ieee80211_vif_to_wdev(mvmsta->vif),
trig);
if (trig_check && rx_status->signal < rssi)
iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
NULL);
}
if (ieee80211_is_data(hdr->frame_control))
iwl_mvm_rx_csum(sta, skb, desc);
if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) {
kfree_skb(skb);
goto out;
}
/*
* Our hardware de-aggregates AMSDUs but copies the mac header
* as it to the de-aggregated MPDUs. We need to turn off the
* AMSDU bit in the QoS control ourselves.
* In addition, HW reverses addr3 and addr4 - reverse it back.
*/
if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
!WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
if (mvm->trans->cfg->device_family ==
IWL_DEVICE_FAMILY_9000) {
iwl_mvm_flip_address(hdr->addr3);
if (ieee80211_has_a4(hdr->frame_control))
iwl_mvm_flip_address(hdr->addr4);
}
}
if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
u32 reorder_data = le32_to_cpu(desc->reorder_data);
iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
}
}
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_status->bw = RATE_INFO_BW_40;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_status->bw = RATE_INFO_BW_80;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_status->bw = RATE_INFO_BW_160;
break;
}
if (he_type == RATE_MCS_HE_TYPE_EXT_SU &&
rate_n_flags & RATE_MCS_HE_106T_MSK) {
rx_status->bw = RATE_INFO_BW_HE_RU;
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
}
if (rate_n_flags & RATE_MCS_HE_MSK &&
phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD &&
he_type == RATE_MCS_HE_TYPE_MU) {
/*
* Unfortunately, we have to leave the mac80211 data
* incorrect for the case that we receive an HE-MU
* transmission and *don't* have the he_mu pointer,
* i.e. we don't have the phy data (due to the bits
* being used for TSF). This shouldn't happen though
* as management frames where we need the TSF/timers
* are not be transmitted in HE-MU, I think.
*/
u8 ru = FIELD_GET(IWL_RX_HE_PHY_RU_ALLOC_MASK, he_phy_data);
u8 offs = 0;
rx_status->bw = RATE_INFO_BW_HE_RU;
switch (ru) {
case 0 ... 36:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
offs = ru;
break;
case 37 ... 52:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
offs = ru - 37;
break;
case 53 ... 60:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
offs = ru - 53;
break;
case 61 ... 64:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
offs = ru - 61;
break;
case 65 ... 66:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
offs = ru - 65;
break;
case 67:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
break;
case 68:
rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
break;
}
he->data2 |=
le16_encode_bits(offs,
IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
he->data2 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN);
if (he_phy_data & IWL_RX_HE_PHY_RU_ALLOC_SEC80)
he->data2 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC);
} else if (he) {
he->data1 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
}
if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
rate_n_flags & RATE_MCS_SGI_MSK)
rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
if (rate_n_flags & RATE_HT_MCS_GF_MSK)
rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
if (rate_n_flags & RATE_MCS_LDPC_MSK)
rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
if (rate_n_flags & RATE_MCS_HT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->encoding = RX_ENC_HT;
rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->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->encoding = RX_ENC_VHT;
rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
if (rate_n_flags & RATE_MCS_BF_MSK)
rx_status->enc_flags |= RX_ENC_FLAG_BF;
} else if (he) {
u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->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->encoding = RX_ENC_HE;
rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
if (rate_n_flags & RATE_MCS_BF_MSK)
rx_status->enc_flags |= RX_ENC_FLAG_BF;
rx_status->he_dcm =
!!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK);
#define CHECK_TYPE(F) \
BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \
(RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS))
CHECK_TYPE(SU);
CHECK_TYPE(EXT_SU);
CHECK_TYPE(MU);
CHECK_TYPE(TRIG);
he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS);
if (rate_n_flags & RATE_MCS_BF_POS)
he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF);
switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >>
RATE_MCS_HE_GI_LTF_POS) {
case 0:
rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
break;
case 1:
rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
break;
case 2:
rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
break;
case 3:
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
else
rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2;
break;
}
switch (he_type) {
case RATE_MCS_HE_TYPE_SU: {
u16 val;
/* LTF syms correspond to streams */
he->data2 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN);
switch (rx_status->nss) {
case 1:
val = 0;
break;
case 2:
val = 1;
break;
case 3:
case 4:
val = 2;
break;
case 5:
case 6:
val = 3;
break;
case 7:
case 8:
val = 4;
break;
default:
WARN_ONCE(1, "invalid nss: %d\n",
rx_status->nss);
val = 0;
}
he->data5 |=
le16_encode_bits(val,
IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS);
}
break;
case RATE_MCS_HE_TYPE_MU: {
u16 val;
u64 he_phy_data;
if (mvm->trans->cfg->device_family >=
IWL_DEVICE_FAMILY_22560)
he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
else
he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
if (he_phy_data == HE_PHY_DATA_INVAL)
break;
val = FIELD_GET(IWL_RX_HE_PHY_HE_LTF_NUM_MASK,
he_phy_data);
he->data2 |=
cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN);
he->data5 |=
cpu_to_le16(FIELD_PREP(
IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS,
val));
}
break;
case RATE_MCS_HE_TYPE_EXT_SU:
case RATE_MCS_HE_TYPE_TRIG:
/* not supported yet */
break;
}
} else {
int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
rx_status->band);
if (WARN(rate < 0 || rate > 0xFF,
"Invalid rate flags 0x%x, band %d,\n",
rate_n_flags, rx_status->band)) {
kfree_skb(skb);
goto out;
}
rx_status->rate_idx = rate;
}
/* management stuff on default queue */
if (!queue) {
if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)) &&
mvm->sched_scan_pass_all ==
SCHED_SCAN_PASS_ALL_ENABLED))
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)))
rx_status->boottime_ns = ktime_get_boot_ns();
}
if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) {
kfree_skb(skb);
goto out;
}
if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
out:
rcu_read_unlock();
}
void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb, int queue)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_frame_release *release = (void *)pkt->data;
struct ieee80211_sta *sta;
struct iwl_mvm_reorder_buffer *reorder_buf;
struct iwl_mvm_baid_data *ba_data;
int baid = release->baid;
IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
release->baid, le16_to_cpu(release->nssn));
if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
return;
rcu_read_lock();
ba_data = rcu_dereference(mvm->baid_map[baid]);
if (WARN_ON_ONCE(!ba_data))
goto out;
sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
goto out;
reorder_buf = &ba_data->reorder_buf[queue];
spin_lock_bh(&reorder_buf->lock);
iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf,
le16_to_cpu(release->nssn));
spin_unlock_bh(&reorder_buf->lock);
out:
rcu_read_unlock();
}