> On Mon, Mar 11, 2019 at 03:25:18PM +0100, Lorenzo Bianconi wrote: > > On Mar 11, Stanislaw Gruszka wrote: > > > On Mon, Mar 11, 2019 at 01:35:24PM +0100, Lorenzo Bianconi wrote: > > > > Introduce tx_aligned4_skbs in mt76_driver_ops and move > > > > mt76_insert_hdr_pad in mt76_dma_tx_queue_skb. This is a preliminary > > > > patch in order to unify tx dma mapping for mt76x02 and new chipsets > > > > > > > > Signed-off-by: Felix Fietkau <nbd@xxxxxxxx> > > > > Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx> > > > > --- > > > > drivers/net/wireless/mediatek/mt76/dma.c | 3 +++ > > > > drivers/net/wireless/mediatek/mt76/mt76.h | 1 + > > > > drivers/net/wireless/mediatek/mt76/mt76x0/pci.c | 1 + > > > > drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c | 13 +++++-------- > > > > drivers/net/wireless/mediatek/mt76/mt76x2/pci.c | 1 + > > > > 5 files changed, 11 insertions(+), 8 deletions(-) > > > > > > > > diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c > > > > index a66832a02281..14dd6585bab4 100644 > > > > --- a/drivers/net/wireless/mediatek/mt76/dma.c > > > > +++ b/drivers/net/wireless/mediatek/mt76/dma.c > > > > @@ -300,6 +300,9 @@ mt76_dma_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid, > > > > } > > > > > > > > skb->prev = skb->next = NULL; > > > > + if (dev->drv->tx_aligned4_skbs) > > > > + mt76_insert_hdr_pad(skb); > > > > > > We need 4 bytes aligned skbs for mt76x02 or we just need header > > > lenght be multiple of 4 ? > > > > I think IV/LLC should be 4 byte aligned > > mt76_insert_hdr_pad() does not change alignment of IV/LLC , it only > moves header. > > I'm not sure what is actually needed (4 bytes alignment or 4 bytes > lenght), but I just saw Felix sent 2 mac80211 patches that hopfully > do the right thing, so this code after appling mac80211 changes > and set TX_NEEDS_ALIGNED4_SKBS can be removed. this is the plan :) Regards, Lorenzo > > Stanislaw >
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