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@xxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mac80211.c | 55 ++++++++++++++++++-
drivers/net/wireless/mediatek/mt76/mt76.h | 6 ++
.../net/wireless/mediatek/mt76/mt7915/init.c | 4 +-
.../net/wireless/mediatek/mt76/mt7915/mac.c | 16 +++++-
.../net/wireless/mediatek/mt76/mt7915/mac.h | 4 ++
5 files changed, 81 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index a778ecc65261..6c3f29a9f800 100644
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -515,6 +515,45 @@ void mt76_free_device(struct mt76_dev *dev)
}
EXPORT_SYMBOL_GPL(mt76_free_device);
+static void mt76_rx_release_burst(struct mt76_dev *dev, enum mt76_rxq_id q,
+ struct sk_buff *skb)
+{
+ struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+ struct sk_buff *nskb = dev->rx_amsdu[q].head;
+
+ /* first amsdu subframe */
+ if (status->first_amsdu) {
+ dev->rx_amsdu[q].tail = &skb_shinfo(skb)->frag_list;
+ dev->rx_amsdu[q].seqno = status->seqno;
+ dev->rx_amsdu[q].head = skb;
+ goto enqueue;
+ }
+
+ /* ampdu or out-of-order amsdu subframes */
+ if (!status->amsdu || status->seqno != dev->rx_amsdu[q].seqno) {
+ /* release pending frames */
+ if (dev->rx_amsdu[q].head)
+ __skb_queue_tail(&dev->rx_skb[q],
+ dev->rx_amsdu[q].head);
+ nskb = skb;
+ goto reset_burst;
+ }
+
+ /* trailing amsdu subframes */
+ *dev->rx_amsdu[q].tail = skb;
+ if (!status->last_amsdu) {
+ dev->rx_amsdu[q].tail = &skb->next;
+ return;
+ }
+
+reset_burst:
+ dev->rx_amsdu[q].head = NULL;
+ dev->rx_amsdu[q].tail = NULL;
+enqueue:
+ if (nskb)
+ __skb_queue_tail(&dev->rx_skb[q], nskb);
+}
+
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;
@@ -532,7 +571,8 @@ void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
dev->test.rx_stats.fcs_error[q]++;
}
#endif
- __skb_queue_tail(&dev->rx_skb[q], skb);
+
+ mt76_rx_release_burst(dev, q, skb);
}
EXPORT_SYMBOL_GPL(mt76_rx);
@@ -936,13 +976,26 @@ 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);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index ca724805eb69..0ce949cbb92a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -493,6 +493,7 @@ 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;
@@ -593,6 +594,11 @@ struct mt76_dev {
spinlock_t rx_lock;
struct napi_struct napi[__MT_RXQ_MAX];
struct sk_buff_head rx_skb[__MT_RXQ_MAX];
+ struct {
+ struct sk_buff *head;
+ struct sk_buff **tail;
+ u16 seqno;
+ } rx_amsdu[__MT_RXQ_MAX];
struct list_head txwi_cache;
struct mt76_queue *q_tx[2 * __MT_TXQ_MAX];
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 5884c0ce45e5..d3de4f9a3fdd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -45,8 +45,8 @@ static void mt7915_mac_init(struct mt7915_dev *dev)
mt76_rmw_field(dev, MT_MDP_DCR1, MT_MDP_DCR1_MAX_RX_LEN, 1536);
/* enable rx rate report */
mt76_set(dev, MT_DMA_DCR0, MT_DMA_DCR0_RXD_G5_EN);
- /* 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,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index a7118df7b93f..ad64ab75d6c4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -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);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
index 456bb81790f5..7b074a10432a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
@@ -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)
--
2.26.2
