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net: sxgbe: add Checksum offload support for Samsung sxgbe

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This patch adds TX and RX checksum offload support.

Signed-off-by: Vipul Pandya <vipul.pandya@samsung.com>
Neatening-by: Joe Perches <joe@perches.com>
Signed-off-by: Byungho An <bh74.an@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vipul Pandya 2014-03-25 12:11:02 -07:00 committed by David S. Miller
parent 1051125d8d
commit 8f7807ae41
4 changed files with 61 additions and 12 deletions
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5
drivers/net/ethernet/samsung/sxgbe/sxgbe_common.h
View file

@ -340,6 +340,10 @@ struct sxgbe_core_ops {
void (*set_eee_timer)(void __iomem *ioaddr, const int ls,
const int tw);
void (*set_eee_pls)(void __iomem *ioaddr, const int link);
/* Enable disable checksum offload operations */
void (*enable_rx_csum)(void __iomem *ioaddr);
void (*disable_rx_csum)(void __iomem *ioaddr);
};
const struct sxgbe_core_ops *sxgbe_get_core_ops(void);
@ -452,6 +456,7 @@ struct sxgbe_priv_data {
struct sxgbe_ops *hw; /* sxgbe specific ops */
int no_csum_insertion;
int irq;
int rxcsum_insertion;
spinlock_t stats_lock; /* lock for tx/rx statatics */
struct phy_device *phydev;

20
drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c
View file

@ -218,6 +218,24 @@ static void sxgbe_set_eee_timer(void __iomem *ioaddr,
writel(value, ioaddr + SXGBE_CORE_LPI_TIMER_CTRL);
}
static void sxgbe_enable_rx_csum(void __iomem *ioaddr)
{
u32 ctrl;
ctrl = readl(ioaddr + SXGBE_CORE_RX_CONFIG_REG);
ctrl |= SXGBE_RX_CSUMOFFLOAD_ENABLE;
writel(ctrl, ioaddr + SXGBE_CORE_RX_CONFIG_REG);
}
static void sxgbe_disable_rx_csum(void __iomem *ioaddr)
{
u32 ctrl;
ctrl = readl(ioaddr + SXGBE_CORE_RX_CONFIG_REG);
ctrl &= ~SXGBE_RX_CSUMOFFLOAD_ENABLE;
writel(ctrl, ioaddr + SXGBE_CORE_RX_CONFIG_REG);
}
const struct sxgbe_core_ops core_ops = {
.core_init = sxgbe_core_init,
.dump_regs = sxgbe_core_dump_regs,
@ -234,6 +252,8 @@ const struct sxgbe_core_ops core_ops = {
.reset_eee_mode = sxgbe_reset_eee_mode,
.set_eee_timer = sxgbe_set_eee_timer,
.set_eee_pls = sxgbe_set_eee_pls,
.enable_rx_csum = sxgbe_enable_rx_csum,
.disable_rx_csum = sxgbe_disable_rx_csum,
};
const struct sxgbe_core_ops *sxgbe_get_core_ops(void)

2
drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.h
View file

@ -113,7 +113,7 @@ struct sxgbe_rx_norm_desc {
/* WB RDES3 */
u32 pkt_len:14;
u32 rdes3_reserved:1;
u32 err_summary:15;
u32 err_summary:1;
u32 err_l2_type:4;
u32 layer34_pkt_type:4;
u32 no_coagulation_pkt:1;

46
drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
View file

@ -1252,6 +1252,7 @@ void sxgbe_tso_prepare(struct sxgbe_priv_data *priv,
static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned int entry, frag_num;
int cksum_flag = 0;
struct netdev_queue *dev_txq;
unsigned txq_index = skb_get_queue_mapping(skb);
struct sxgbe_priv_data *priv = netdev_priv(dev);
@ -1332,7 +1333,7 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev)
__func__);
priv->hw->desc->prepare_tx_desc(tx_desc, 1, no_pagedlen,
no_pagedlen, 0);
no_pagedlen, cksum_flag);
}
}
@ -1350,7 +1351,7 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev)
/* prepare the descriptor */
priv->hw->desc->prepare_tx_desc(tx_desc, 0, len,
len, 0);
len, cksum_flag);
/* memory barrier to flush descriptor */
wmb();
@ -1471,6 +1472,8 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit)
unsigned int entry = priv->rxq[qnum]->cur_rx;
unsigned int next_entry = 0;
unsigned int count = 0;
int checksum;
int status;
while (count < limit) {
struct sxgbe_rx_norm_desc *p;
@ -1487,7 +1490,18 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit)
next_entry = (++priv->rxq[qnum]->cur_rx) % rxsize;
prefetch(priv->rxq[qnum]->dma_rx + next_entry);
/*TO DO read the status of the incoming frame */
/* Read the status of the incoming frame and also get checksum
* value based on whether it is enabled in SXGBE hardware or
* not.
*/
status = priv->hw->desc->rx_wbstatus(p, &priv->xstats,
&checksum);
if (unlikely(status < 0)) {
entry = next_entry;
continue;
}
if (unlikely(!priv->rxcsum_insertion))
checksum = CHECKSUM_NONE;
skb = priv->rxq[qnum]->rx_skbuff[entry];
@ -1501,7 +1515,11 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit)
skb_put(skb, frame_len);
netif_receive_skb(skb);
skb->ip_summed = checksum;
if (checksum == CHECKSUM_NONE)
netif_receive_skb(skb);
else
napi_gro_receive(&priv->napi, skb);
entry = next_entry;
}
@ -1748,15 +1766,15 @@ static int sxgbe_set_features(struct net_device *dev,
{
struct sxgbe_priv_data *priv = netdev_priv(dev);
netdev_features_t changed = dev->features ^ features;
u32 ctrl;
if (changed & NETIF_F_RXCSUM) {
ctrl = readl(priv->ioaddr + SXGBE_CORE_RX_CONFIG_REG);
if (features & NETIF_F_RXCSUM)
ctrl |= SXGBE_RX_CSUMOFFLOAD_ENABLE;
else
ctrl &= ~SXGBE_RX_CSUMOFFLOAD_ENABLE;
writel(ctrl, priv->ioaddr + SXGBE_CORE_RX_CONFIG_REG);
if (features & NETIF_F_RXCSUM) {
priv->hw->mac->enable_rx_csum(priv->ioaddr);
priv->rxcsum_insertion = true;
} else {
priv->hw->mac->disable_rx_csum(priv->ioaddr);
priv->rxcsum_insertion = false;
}
}
return 0;
@ -2115,6 +2133,12 @@ struct sxgbe_priv_data *sxgbe_drv_probe(struct device *device,
}
}
/* Enable Rx checksum offload */
if (priv->hw_cap.rx_csum_offload) {
priv->hw->mac->enable_rx_csum(priv->ioaddr);
priv->rxcsum_insertion = true;
}
/* Rx Watchdog is available, enable depend on platform data */
if (!priv->plat->riwt_off) {
priv->use_riwt = 1;