From cc772ab7cdcaa24d1fae332d92a1602788644f7a Mon Sep 17 00:00:00 2001 From: Manfred Rudigier Date: Thu, 8 Apr 2010 23:10:03 +0000 Subject: gianfar: Add hardware RX timestamping support The device is configured to insert hardware timestamps into all received packets. The RX timestamps are extracted from the padding alingment bytes during the clean_rx_ring operation and copied into the skb_shared_hwtstamps struct of the skb. This extraction only happens if the rx_filter was set to something else than HWTSTAMP_FILTER_NONE with the SIOCSHWTSTAMP ioctl command. Hardware timestamping is only supported for eTSEC devices. To indicate device support the new FSL_GIANFAR_DEV_HAS_TIMER flag was introduced. Signed-off-by: Manfred Rudigier Signed-off-by: David S. Miller --- drivers/net/gianfar.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 61 insertions(+), 5 deletions(-) (limited to 'drivers/net/gianfar.c') diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index 5175233..d102484 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -82,6 +82,7 @@ #include #include #include +#include #include #include @@ -377,6 +378,13 @@ static void gfar_init_mac(struct net_device *ndev) rctrl |= RCTRL_PADDING(priv->padding); } + /* Insert receive time stamps into padding alignment bytes */ + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) { + rctrl &= ~RCTRL_PAL_MASK; + rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE | RCTRL_PADDING(8); + priv->padding = 8; + } + /* keep vlan related bits if it's enabled */ if (priv->vlgrp) { rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; @@ -501,7 +509,8 @@ void unlock_tx_qs(struct gfar_private *priv) /* Returns 1 if incoming frames use an FCB */ static inline int gfar_uses_fcb(struct gfar_private *priv) { - return priv->vlgrp || priv->rx_csum_enable; + return priv->vlgrp || priv->rx_csum_enable || + (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER); } static void free_tx_pointers(struct gfar_private *priv) @@ -742,7 +751,8 @@ static int gfar_of_init(struct of_device *ofdev, struct net_device **pdev) FSL_GIANFAR_DEV_HAS_CSUM | FSL_GIANFAR_DEV_HAS_VLAN | FSL_GIANFAR_DEV_HAS_MAGIC_PACKET | - FSL_GIANFAR_DEV_HAS_EXTENDED_HASH; + FSL_GIANFAR_DEV_HAS_EXTENDED_HASH | + FSL_GIANFAR_DEV_HAS_TIMER; ctype = of_get_property(np, "phy-connection-type", NULL); @@ -772,6 +782,38 @@ err_grp_init: return err; } +static int gfar_hwtstamp_ioctl(struct net_device *netdev, + struct ifreq *ifr, int cmd) +{ + struct hwtstamp_config config; + struct gfar_private *priv = netdev_priv(netdev); + + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) + return -EFAULT; + + /* reserved for future extensions */ + if (config.flags) + return -EINVAL; + + if (config.tx_type) + return -ERANGE; + + switch (config.rx_filter) { + case HWTSTAMP_FILTER_NONE: + priv->hwts_rx_en = 0; + break; + default: + if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) + return -ERANGE; + priv->hwts_rx_en = 1; + config.rx_filter = HWTSTAMP_FILTER_ALL; + break; + } + + return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? + -EFAULT : 0; +} + /* Ioctl MII Interface */ static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { @@ -780,6 +822,9 @@ static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) if (!netif_running(dev)) return -EINVAL; + if (cmd == SIOCSHWTSTAMP) + return gfar_hwtstamp_ioctl(dev, rq, cmd); + if (!priv->phydev) return -ENODEV; @@ -982,7 +1027,8 @@ static int gfar_probe(struct of_device *ofdev, else priv->padding = 0; - if (dev->features & NETIF_F_IP_CSUM) + if (dev->features & NETIF_F_IP_CSUM || + priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) dev->hard_header_len += GMAC_FCB_LEN; /* Program the isrg regs only if number of grps > 1 */ @@ -2474,6 +2520,17 @@ static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, skb_pull(skb, amount_pull); } + /* Get receive timestamp from the skb */ + if (priv->hwts_rx_en) { + struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); + u64 *ns = (u64 *) skb->data; + memset(shhwtstamps, 0, sizeof(*shhwtstamps)); + shhwtstamps->hwtstamp = ns_to_ktime(*ns); + } + + if (priv->padding) + skb_pull(skb, priv->padding); + if (priv->rx_csum_enable) gfar_rx_checksum(skb, fcb); @@ -2510,8 +2567,7 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit) bdp = rx_queue->cur_rx; base = rx_queue->rx_bd_base; - amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0) + - priv->padding; + amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0); while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { struct sk_buff *newskb; -- cgit v1.1