diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2020-01-15 13:58:56 +0300 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2020-02-14 12:06:06 +0300 |
| commit | 9803b7b1617670f18ca88dbd9530d92890f84877 (patch) | |
| tree | 802112244861e28062a1a3f60521745b4ea1846b /drivers/net/wireless/mediatek/mt76/usb.c | |
| parent | 16d6dac00939970e7e715aaa115952f6736102b9 (diff) | |
| download | linux-9803b7b1617670f18ca88dbd9530d92890f84877.tar.xz | |
mt76: mt76u: introduce mt76u_skb_dma_info routine
Introduce mt76u_skb_dma_info utility routine in mt76-usb module in order
to be reused adding mt7663u support
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/usb.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/usb.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c index 1f29cd905fdd..57d2590165e3 100644 --- a/drivers/net/wireless/mediatek/mt76/usb.c +++ b/drivers/net/wireless/mediatek/mt76/usb.c @@ -907,6 +907,35 @@ mt76u_tx_setup_buffers(struct mt76_dev *dev, struct sk_buff *skb, return urb->num_sgs; } +int mt76u_skb_dma_info(struct sk_buff *skb, u32 info) +{ + struct sk_buff *iter, *last = skb; + u32 pad; + + put_unaligned_le32(info, skb_push(skb, sizeof(info))); + /* Add zero pad of 4 - 7 bytes */ + pad = round_up(skb->len, 4) + 4 - skb->len; + + /* First packet of a A-MSDU burst keeps track of the whole burst + * length, need to update length of it and the last packet. + */ + skb_walk_frags(skb, iter) { + last = iter; + if (!iter->next) { + skb->data_len += pad; + skb->len += pad; + break; + } + } + + if (skb_pad(last, pad)) + return -ENOMEM; + __skb_put(last, pad); + + return 0; +} +EXPORT_SYMBOL_GPL(mt76u_skb_dma_info); + static int mt76u_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid, struct sk_buff *skb, struct mt76_wcid *wcid, |