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mt76: mt7921e: process txfree and txstatus without allocating skbs

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Similar to mt7915 driver, process txfree and txstatus without allocating
skbs in order to reduce pressure on the memory allocator

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi
2021-12-28 13:01:19 +01:00
committed by Felix Fietkau
parent 6e39e9a19c
commit 3f1c16fd8e
4 changed files with 33 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/wireless/mediatek/mt76/mt7921/mac.c
View File

@@ -1195,6 +1195,7 @@ void mt7921_mac_add_txs(struct mt7921_dev *dev, void *data)
out:
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(mt7921_mac_add_txs);
void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
struct sk_buff *skb)

1
drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
View File

@@ -434,6 +434,7 @@ int mt7921_mcu_fill_message(struct mt76_dev *mdev, struct sk_buff *skb,
int mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
struct sk_buff *skb, int seq);
bool mt7921e_rx_check(struct mt76_dev *mdev, void *data, int len);
void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
struct sk_buff *skb);
int mt7921e_driver_own(struct mt7921_dev *dev);

1
drivers/net/wireless/mediatek/mt76/mt7921/pci.c
View File

@@ -134,6 +134,7 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
.token_size = MT7921_TOKEN_SIZE,
.tx_prepare_skb = mt7921e_tx_prepare_skb,
.tx_complete_skb = mt7921e_tx_complete_skb,
.rx_check = mt7921e_rx_check,
.rx_skb = mt7921e_queue_rx_skb,
.rx_poll_complete = mt7921_rx_poll_complete,
.sta_ps = mt7921_sta_ps,

36
drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c
View File

@@ -148,14 +148,15 @@ mt7921_txwi_free(struct mt7921_dev *dev, struct mt76_txwi_cache *t,
}
static void
mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
mt7921e_mac_tx_free(struct mt7921_dev *dev, void *data, int len)
{
struct mt7921_tx_free *free = (struct mt7921_tx_free *)skb->data;
struct mt7921_tx_free *free = (struct mt7921_tx_free *)data;
struct mt76_dev *mdev = &dev->mt76;
struct mt76_txwi_cache *txwi;
struct ieee80211_sta *sta = NULL;
struct sk_buff *skb, *tmp;
void *end = data + len;
LIST_HEAD(free_list);
struct sk_buff *tmp;
bool wake = false;
u8 i, count;
@@ -168,6 +169,9 @@ mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
* Should avoid accessing WTBL to get Tx airtime, and use it instead.
*/
count = FIELD_GET(MT_TX_FREE_MSDU_CNT, le16_to_cpu(free->ctrl));
if (WARN_ON_ONCE((void *)&free->info[count] > end))
return;
for (i = 0; i < count; i++) {
u32 msdu, info = le32_to_cpu(free->info[i]);
u8 stat;
@@ -208,8 +212,6 @@ mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
if (wake)
mt76_set_tx_blocked(&dev->mt76, false);
napi_consume_skb(skb, 1);
list_for_each_entry_safe(skb, tmp, &free_list, list) {
skb_list_del_init(skb);
napi_consume_skb(skb, 1);
@@ -222,6 +224,27 @@ mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
mt76_worker_schedule(&dev->mt76.tx_worker);
}
bool mt7921e_rx_check(struct mt76_dev *mdev, void *data, int len)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
__le32 *rxd = (__le32 *)data;
__le32 *end = (__le32 *)&rxd[len / 4];
enum rx_pkt_type type;
type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0]));
switch (type) {
case PKT_TYPE_TXRX_NOTIFY:
mt7921e_mac_tx_free(dev, data, len);
return false;
case PKT_TYPE_TXS:
for (rxd += 2; rxd + 8 <= end; rxd += 8)
mt7921_mac_add_txs(dev, rxd);
return false;
default:
return true;
}
}
void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
struct sk_buff *skb)
{
@@ -233,7 +256,8 @@ void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
switch (type) {
case PKT_TYPE_TXRX_NOTIFY:
mt7921_mac_tx_free(dev, skb);
mt7921e_mac_tx_free(dev, skb->data, skb->len);
napi_consume_skb(skb, 1);
break;
default:
mt7921_queue_rx_skb(mdev, q, skb);