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Date: Wed, 07 May 2014 17:14:00 +0900
From: Byungho An <bh74.an@...sung.com>
To: netdev@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Cc: davem@...emloft.net, ks.giri@...sung.com, vipul.pandya@...sung.com
Subject: [PATCH] net: sxgbe: Added tail point update
This patch adds tail point update function for rx path
after rx_refill function. It indicates tail point for rx dma.
Signed-off-by: Byungho An <bh74.an@...sung.com>
---
drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c | 14 +++++++++++++-
drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h | 4 ++++
drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c | 5 +++++
3 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c
index 49240c9..249b0e0 100644
--- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c
+++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c
@@ -112,7 +112,7 @@ static void sxgbe_dma_channel_init(void __iomem *ioaddr, int cha_num,
dma_addr = dma_rx + ((r_rsize - 1) * SXGBE_DESC_SIZE_BYTES);
writel(lower_32_bits(dma_addr),
- ioaddr + SXGBE_DMA_CHA_RXDESC_LADD_REG(cha_num));
+ ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(cha_num));
/* program the ring sizes */
writel(t_rsize - 1, ioaddr + SXGBE_DMA_CHA_TXDESC_RINGLEN_REG(cha_num));
writel(r_rsize - 1, ioaddr + SXGBE_DMA_CHA_RXDESC_RINGLEN_REG(cha_num));
@@ -370,6 +370,17 @@ static void sxgbe_enable_tso(void __iomem *ioaddr, u8 chan_num)
writel(ctrl, ioaddr + SXGBE_DMA_CHA_TXCTL_REG(chan_num));
}
+static void sxgbe_dma_update_rxdesc_tail_ptr(void __iomem *ioaddr, u8 chan_num,
+ dma_addr_t dma_rx_phy, int cur_rx,
+ int rxsize)
+{
+ u32 reg_val;
+
+ reg_val = (dma_rx_phy & 0xFFFFFFFF) + ((cur_rx % rxsize) *
+ SXGBE_DESC_SIZE_BYTES);
+ writel(reg_val, ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(chan_num));
+}
+
static const struct sxgbe_dma_ops sxgbe_dma_ops = {
.init = sxgbe_dma_init,
.cha_init = sxgbe_dma_channel_init,
@@ -386,6 +397,7 @@ static const struct sxgbe_dma_ops sxgbe_dma_ops = {
.rx_dma_int_status = sxgbe_rx_dma_int_status,
.rx_watchdog = sxgbe_dma_rx_watchdog,
.enable_tso = sxgbe_enable_tso,
+ .update_rxdesc_tail_ptr = sxgbe_dma_update_rxdesc_tail_ptr,
};
const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void)
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h
index 843fa9b..a06e01e 100644
--- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h
+++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h
@@ -43,6 +43,10 @@ struct sxgbe_dma_ops {
void (*rx_watchdog)(void __iomem *ioaddr, u32 riwt);
/* Enable TSO for each DMA channel */
void (*enable_tso)(void __iomem *ioaddr, u8 chan_num);
+ void (*update_rxdesc_tail_ptr)(void __iomem *ioaddr, u8 chan_num,
+ dma_addr_t dma_rx, int r_rentry,
+ int r_rsize);
+
};
const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void);
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
index 93bf151..7dc3449 100644
--- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
+++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
@@ -1521,6 +1521,7 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit)
skb_put(skb, frame_len);
skb->ip_summed = checksum;
+ skb->protocol = eth_type_trans(skb, priv->dev);
if (checksum == CHECKSUM_NONE)
netif_receive_skb(skb);
else
@@ -1530,6 +1531,10 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit)
}
sxgbe_rx_refill(priv);
+ priv->hw->dma->update_rxdesc_tail_ptr(priv->ioaddr, qnum,
+ priv->rxq[qnum]->dma_rx_phy,
+ priv->rxq[qnum]->cur_rx,
+ priv->dma_rx_size);
return count;
}
--
1.7.10.4
--
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