Messages in this thread | | | From | Jose Abreu <> | Subject | RE: [PATCH 1/4] net: stmmac: update rx tail pointer register to fix rx dma hang issue. | Date | Mon, 29 Apr 2019 08:51:39 +0000 |
| |
From: Biao Huang <biao.huang@mediatek.com> Date: Mon, Apr 29, 2019 at 07:15:53
> Currently we will not update the receive descriptor tail pointer in > stmmac_rx_refill. Rx dma will think no available descriptors and stop > once received packets exceed DMA_RX_SIZE, so that the rx only test will fail. > > Update the receive tail pointer in stmmac_rx_refill to add more descriptors > to the rx channel, so packets can be received continually > > Signed-off-by: Biao Huang <biao.huang@mediatek.com> > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > index 97c5e1a..818ad88 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > @@ -3336,6 +3336,9 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) > entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE); > } > rx_q->dirty_rx = entry; > + stmmac_set_rx_tail_ptr(priv, priv->ioaddr, > + rx_q->dma_rx_phy + (entry * sizeof(struct dma_desc)),
I think you can just use the "rx_q->rx_tail_addr" here. It'll always trigger a poll demand for the channel.
Thanks, Jose Miguel Abreu
| |