diff options
Diffstat (limited to 'drivers/net/stmmac/stmmac_main.c')
| -rw-r--r-- | drivers/net/stmmac/stmmac_main.c | 87 |
1 files changed, 24 insertions, 63 deletions
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c index cc973fc38405..e25e44a45c28 100644 --- a/drivers/net/stmmac/stmmac_main.c +++ b/drivers/net/stmmac/stmmac_main.c @@ -45,6 +45,7 @@ #include <linux/if_vlan.h> #include <linux/dma-mapping.h> #include <linux/slab.h> +#include <linux/prefetch.h> #include "stmmac.h" #define STMMAC_RESOURCE_NAME "stmmaceth" @@ -116,9 +117,6 @@ static int tc = TC_DEFAULT; module_param(tc, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(tc, "DMA threshold control value"); -#define RX_NO_COALESCE 1 /* Always interrupt on completion */ -#define TX_NO_COALESCE -1 /* No moderation by default */ - /* Pay attention to tune this parameter; take care of both * hardware capability and network stabitily/performance impact. * Many tests showed that ~4ms latency seems to be good enough. */ @@ -139,7 +137,6 @@ static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFDOWN | NETIF_MSG_TIMER); static irqreturn_t stmmac_interrupt(int irq, void *dev_id); -static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev); /** * stmmac_verify_args - verify the driver parameters. @@ -831,6 +828,7 @@ static int stmmac_open(struct net_device *dev) pr_info("stmmac: Rx Checksum Offload Engine supported\n"); if (priv->plat->tx_coe) pr_info("\tTX Checksum insertion supported\n"); + netdev_update_features(dev); /* Initialise the MMC (if present) to disable all interrupts. */ writel(0xffffffff, priv->ioaddr + MMC_HIGH_INTR_MASK); @@ -934,46 +932,6 @@ static int stmmac_release(struct net_device *dev) return 0; } -/* - * To perform emulated hardware segmentation on skb. - */ -static int stmmac_sw_tso(struct stmmac_priv *priv, struct sk_buff *skb) -{ - struct sk_buff *segs, *curr_skb; - int gso_segs = skb_shinfo(skb)->gso_segs; - - /* Estimate the number of fragments in the worst case */ - if (unlikely(stmmac_tx_avail(priv) < gso_segs)) { - netif_stop_queue(priv->dev); - TX_DBG(KERN_ERR "%s: TSO BUG! Tx Ring full when queue awake\n", - __func__); - if (stmmac_tx_avail(priv) < gso_segs) - return NETDEV_TX_BUSY; - - netif_wake_queue(priv->dev); - } - TX_DBG("\tstmmac_sw_tso: segmenting: skb %p (len %d)\n", - skb, skb->len); - - segs = skb_gso_segment(skb, priv->dev->features & ~NETIF_F_TSO); - if (IS_ERR(segs)) - goto sw_tso_end; - - do { - curr_skb = segs; - segs = segs->next; - TX_DBG("\t\tcurrent skb->len: %d, *curr %p," - "*next %p\n", curr_skb->len, curr_skb, segs); - curr_skb->next = NULL; - stmmac_xmit(curr_skb, priv->dev); - } while (segs); - -sw_tso_end: - dev_kfree_skb(skb); - - return NETDEV_TX_OK; -} - static unsigned int stmmac_handle_jumbo_frames(struct sk_buff *skb, struct net_device *dev, int csum_insertion) @@ -1051,16 +1009,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) !skb_is_gso(skb) ? "isn't" : "is"); #endif - if (unlikely(skb_is_gso(skb))) - return stmmac_sw_tso(priv, skb); - - if (likely((skb->ip_summed == CHECKSUM_PARTIAL))) { - if (unlikely((!priv->plat->tx_coe) || - (priv->no_csum_insertion))) - skb_checksum_help(skb); - else - csum_insertion = 1; - } + csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL); desc = priv->dma_tx + entry; first = desc; @@ -1380,18 +1329,29 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu) return -EINVAL; } + dev->mtu = new_mtu; + netdev_update_features(dev); + + return 0; +} + +static u32 stmmac_fix_features(struct net_device *dev, u32 features) +{ + struct stmmac_priv *priv = netdev_priv(dev); + + if (!priv->rx_coe) + features &= ~NETIF_F_RXCSUM; + if (!priv->plat->tx_coe) + features &= ~NETIF_F_ALL_CSUM; + /* Some GMAC devices have a bugged Jumbo frame support that * needs to have the Tx COE disabled for oversized frames * (due to limited buffer sizes). In this case we disable * the TX csum insertionin the TDES and not use SF. */ - if ((priv->plat->bugged_jumbo) && (priv->dev->mtu > ETH_DATA_LEN)) - priv->no_csum_insertion = 1; - else - priv->no_csum_insertion = 0; + if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN)) + features &= ~NETIF_F_ALL_CSUM; - dev->mtu = new_mtu; - - return 0; + return features; } static irqreturn_t stmmac_interrupt(int irq, void *dev_id) @@ -1471,6 +1431,7 @@ static const struct net_device_ops stmmac_netdev_ops = { .ndo_start_xmit = stmmac_xmit, .ndo_stop = stmmac_release, .ndo_change_mtu = stmmac_change_mtu, + .ndo_fix_features = stmmac_fix_features, .ndo_set_multicast_list = stmmac_multicast_list, .ndo_tx_timeout = stmmac_tx_timeout, .ndo_do_ioctl = stmmac_ioctl, @@ -1501,8 +1462,8 @@ static int stmmac_probe(struct net_device *dev) dev->netdev_ops = &stmmac_netdev_ops; stmmac_set_ethtool_ops(dev); - dev->features |= NETIF_F_SG | NETIF_F_HIGHDMA | - NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + dev->features |= dev->hw_features | NETIF_F_HIGHDMA; dev->watchdog_timeo = msecs_to_jiffies(watchdog); #ifdef STMMAC_VLAN_TAG_USED /* Both mac100 and gmac support receive VLAN tag detection */ |