linux_dsm_epyc7002/drivers/net/wireless/ath/ath10k/txrx.c
Rajkumar Manoharan cac085524c ath10k: move mgmt descriptor limit handle under mgmt_tx
Frames that are transmitted via MGMT_TX are using reserved descriptor
slots in firmware. This limitation is for the htt_mgmt_tx path itself,
not for mgmt frames per se. In 16 MBSSID scenario, these reserved slots
will be easy exhausted due to frequent probe responses. So for 10.4
based solutions, probe responses are limited by a threshold (24).

management tx path is separate for all except tlv based solutions. Since
tlv solutions (qca6174 & qca9377) do not support 16 AP interfaces, it is
safe to move management descriptor limitation check under mgmt_tx
function. Though CPU improvement is negligible, unlikely conditions or
never hit conditions in hot path can be avoided on data transmission.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2016-03-18 09:52:27 +02:00

244 lines
6.3 KiB
C

/*
* Copyright (c) 2005-2011 Atheros Communications Inc.
* Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "core.h"
#include "txrx.h"
#include "htt.h"
#include "mac.h"
#include "debug.h"
static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
return;
if (ath10k_mac_tx_frm_has_freq(ar))
return;
/* If the original wait_for_completion() timed out before
* {data,mgmt}_tx_completed() was called then we could complete
* offchan_tx_completed for a different skb. Prevent this by using
* offchan_tx_skb. */
spin_lock_bh(&ar->data_lock);
if (ar->offchan_tx_skb != skb) {
ath10k_warn(ar, "completed old offchannel frame\n");
goto out;
}
complete(&ar->offchan_tx_completed);
ar->offchan_tx_skb = NULL; /* just for sanity */
ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %p\n", skb);
out:
spin_unlock_bh(&ar->data_lock);
}
int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
const struct htt_tx_done *tx_done)
{
struct ath10k *ar = htt->ar;
struct device *dev = ar->dev;
struct ieee80211_tx_info *info;
struct ieee80211_txq *txq;
struct ath10k_skb_cb *skb_cb;
struct ath10k_txq *artxq;
struct sk_buff *msdu;
ath10k_dbg(ar, ATH10K_DBG_HTT,
"htt tx completion msdu_id %u discard %d no_ack %d success %d\n",
tx_done->msdu_id, !!tx_done->discard,
!!tx_done->no_ack, !!tx_done->success);
if (tx_done->msdu_id >= htt->max_num_pending_tx) {
ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
tx_done->msdu_id);
return -EINVAL;
}
spin_lock_bh(&htt->tx_lock);
msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
if (!msdu) {
ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
tx_done->msdu_id);
spin_unlock_bh(&htt->tx_lock);
return -ENOENT;
}
skb_cb = ATH10K_SKB_CB(msdu);
txq = skb_cb->txq;
artxq = (void *)txq->drv_priv;
if (txq)
artxq->num_fw_queued--;
ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
ath10k_htt_tx_dec_pending(htt);
if (htt->num_pending_tx == 0)
wake_up(&htt->empty_tx_wq);
spin_unlock_bh(&htt->tx_lock);
dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
ath10k_report_offchan_tx(htt->ar, msdu);
info = IEEE80211_SKB_CB(msdu);
memset(&info->status, 0, sizeof(info->status));
trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
if (tx_done->discard) {
ieee80211_free_txskb(htt->ar->hw, msdu);
return 0;
}
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
info->flags |= IEEE80211_TX_STAT_ACK;
if (tx_done->no_ack)
info->flags &= ~IEEE80211_TX_STAT_ACK;
if (tx_done->success && (info->flags & IEEE80211_TX_CTL_NO_ACK))
info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
ieee80211_tx_status(htt->ar->hw, msdu);
/* we do not own the msdu anymore */
return 0;
}
struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
const u8 *addr)
{
struct ath10k_peer *peer;
lockdep_assert_held(&ar->data_lock);
list_for_each_entry(peer, &ar->peers, list) {
if (peer->vdev_id != vdev_id)
continue;
if (memcmp(peer->addr, addr, ETH_ALEN))
continue;
return peer;
}
return NULL;
}
struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
{
struct ath10k_peer *peer;
lockdep_assert_held(&ar->data_lock);
list_for_each_entry(peer, &ar->peers, list)
if (test_bit(peer_id, peer->peer_ids))
return peer;
return NULL;
}
static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
const u8 *addr, bool expect_mapped)
{
long time_left;
time_left = wait_event_timeout(ar->peer_mapping_wq, ({
bool mapped;
spin_lock_bh(&ar->data_lock);
mapped = !!ath10k_peer_find(ar, vdev_id, addr);
spin_unlock_bh(&ar->data_lock);
(mapped == expect_mapped ||
test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
}), 3*HZ);
if (time_left == 0)
return -ETIMEDOUT;
return 0;
}
int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
{
return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
}
int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
{
return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
}
void ath10k_peer_map_event(struct ath10k_htt *htt,
struct htt_peer_map_event *ev)
{
struct ath10k *ar = htt->ar;
struct ath10k_peer *peer;
spin_lock_bh(&ar->data_lock);
peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
if (!peer) {
peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
if (!peer)
goto exit;
peer->vdev_id = ev->vdev_id;
ether_addr_copy(peer->addr, ev->addr);
list_add(&peer->list, &ar->peers);
wake_up(&ar->peer_mapping_wq);
}
ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
ev->vdev_id, ev->addr, ev->peer_id);
ar->peer_map[ev->peer_id] = peer;
set_bit(ev->peer_id, peer->peer_ids);
exit:
spin_unlock_bh(&ar->data_lock);
}
void ath10k_peer_unmap_event(struct ath10k_htt *htt,
struct htt_peer_unmap_event *ev)
{
struct ath10k *ar = htt->ar;
struct ath10k_peer *peer;
spin_lock_bh(&ar->data_lock);
peer = ath10k_peer_find_by_id(ar, ev->peer_id);
if (!peer) {
ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
ev->peer_id);
goto exit;
}
ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
peer->vdev_id, peer->addr, ev->peer_id);
ar->peer_map[ev->peer_id] = NULL;
clear_bit(ev->peer_id, peer->peer_ids);
if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
list_del(&peer->list);
kfree(peer);
wake_up(&ar->peer_mapping_wq);
}
exit:
spin_unlock_bh(&ar->data_lock);
}