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mt76: mt7915: enable hw rx-amsdu de-aggregation

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Enable hw rx-amsdu de-aggregation support available in 7915 devices.
This is a preliminary patch to enable rx checksum offload

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi
2020-10-11 23:37:12 +02:00
committed by Felix Fietkau
parent e195dad141
commit cc4b3c139a
5 changed files with 76 additions and 4 deletions
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49
drivers/net/wireless/mediatek/mt76/mac80211.c
View File

@@ -508,6 +508,39 @@ void mt76_free_device(struct mt76_dev *dev)
}
EXPORT_SYMBOL_GPL(mt76_free_device);
static void mt76_rx_release_amsdu(struct mt76_phy *phy, enum mt76_rxq_id q)
{
struct sk_buff *skb = phy->rx_amsdu[q].head;
struct mt76_dev *dev = phy->dev;
phy->rx_amsdu[q].head = NULL;
phy->rx_amsdu[q].tail = NULL;
__skb_queue_tail(&dev->rx_skb[q], skb);
}
static void mt76_rx_release_burst(struct mt76_phy *phy, enum mt76_rxq_id q,
struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
if (phy->rx_amsdu[q].head &&
(!status->amsdu || status->first_amsdu ||
status->seqno != phy->rx_amsdu[q].seqno))
mt76_rx_release_amsdu(phy, q);
if (!phy->rx_amsdu[q].head) {
phy->rx_amsdu[q].tail = &skb_shinfo(skb)->frag_list;
phy->rx_amsdu[q].seqno = status->seqno;
phy->rx_amsdu[q].head = skb;
} else {
*phy->rx_amsdu[q].tail = skb;
phy->rx_amsdu[q].tail = &skb->next;
}
if (!status->amsdu || status->last_amsdu)
mt76_rx_release_amsdu(phy, q);
}
void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
@@ -525,7 +558,8 @@ void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
phy->test.rx_stats.fcs_error[q]++;
}
#endif
__skb_queue_tail(&dev->rx_skb[q], skb);
mt76_rx_release_burst(phy, q, skb);
}
EXPORT_SYMBOL_GPL(mt76_rx);
@@ -937,13 +971,26 @@ void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames,
spin_lock(&dev->rx_lock);
while ((skb = __skb_dequeue(frames)) != NULL) {
struct sk_buff *nskb = skb_shinfo(skb)->frag_list;
if (mt76_check_ccmp_pn(skb)) {
dev_kfree_skb(skb);
continue;
}
skb_shinfo(skb)->frag_list = NULL;
mt76_rx_convert(dev, skb, &hw, &sta);
ieee80211_rx_list(hw, sta, skb, &list);
/* subsequent amsdu frames */
while (nskb) {
skb = nskb;
nskb = nskb->next;
skb->next = NULL;
mt76_rx_convert(dev, skb, &hw, &sta);
ieee80211_rx_list(hw, sta, skb, &list);
}
}
spin_unlock(&dev->rx_lock);

7
drivers/net/wireless/mediatek/mt76/mt76.h
View File

@@ -507,6 +507,7 @@ struct mt76_rx_status {
u8 enc_flags;
u8 encoding:2, bw:3, he_ru:3;
u8 he_gi:2, he_dcm:1;
u8 amsdu:1, first_amsdu:1, last_amsdu:1;
u8 rate_idx;
u8 nss;
u8 band;
@@ -600,6 +601,12 @@ struct mt76_phy {
struct delayed_work mac_work;
u8 mac_work_count;
struct {
struct sk_buff *head;
struct sk_buff **tail;
u16 seqno;
} rx_amsdu[__MT_RXQ_MAX];
};
struct mt76_dev {

4
drivers/net/wireless/mediatek/mt76/mt7915/init.c
View File

@@ -153,8 +153,8 @@ static void mt7915_mac_init(struct mt7915_dev *dev)
int i;
mt76_rmw_field(dev, MT_MDP_DCR1, MT_MDP_DCR1_MAX_RX_LEN, 1536);
/* disable hardware de-agg */
mt76_clear(dev, MT_MDP_DCR0, MT_MDP_DCR0_DAMSDU_EN);
/* enable hardware de-agg */
mt76_set(dev, MT_MDP_DCR0, MT_MDP_DCR0_DAMSDU_EN);
for (i = 0; i < MT7915_WTBL_SIZE; i++)
mt7915_mac_wtbl_update(dev, i,

16
drivers/net/wireless/mediatek/mt76/mt7915/mac.c
View File

@@ -320,8 +320,9 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
u32 rxd1 = le32_to_cpu(rxd[1]);
u32 rxd2 = le32_to_cpu(rxd[2]);
u32 rxd3 = le32_to_cpu(rxd[3]);
u32 rxd4 = le32_to_cpu(rxd[4]);
bool unicast, insert_ccmp_hdr = false;
u8 remove_pad;
u8 remove_pad, amsdu_info;
int i, idx;
memset(status, 0, sizeof(*status));
@@ -338,6 +339,9 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
return -EINVAL;
if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
return -EINVAL;
unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
status->wcid = mt7915_rx_get_wcid(dev, idx, unicast);
@@ -541,6 +545,16 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
skb_pull(skb, (u8 *)rxd - skb->data + 2 * remove_pad);
amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
status->amsdu = !!amsdu_info;
if (status->amsdu) {
status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
memmove(skb->data + 2, skb->data,
ieee80211_get_hdrlen_from_skb(skb));
skb_pull(skb, 2);
}
if (insert_ccmp_hdr) {
u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);

4
drivers/net/wireless/mediatek/mt76/mt7915/mac.h
View File

@@ -86,6 +86,10 @@ enum rx_pkt_type {
/* RXD DW4 */
#define MT_RXD4_NORMAL_PAYLOAD_FORMAT GENMASK(1, 0)
#define MT_RXD4_FIRST_AMSDU_FRAME GENMASK(1, 0)
#define MT_RXD4_MID_AMSDU_FRAME BIT(1)
#define MT_RXD4_LAST_AMSDU_FRAME BIT(0)
#define MT_RXD4_NORMAL_PATTERN_DROP BIT(9)
#define MT_RXD4_NORMAL_CLS BIT(10)
#define MT_RXD4_NORMAL_OFLD GENMASK(12, 11)