1 files changed, 163 insertions, 28 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 4e97ca18299..5267c27e317 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -82,6 +82,7 @@
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <linux/in.h>
+#include <linux/net_tstamp.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -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)
@@ -738,7 +747,8 @@ 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);
 
@@ -768,6 +778,48 @@ 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;
+
+        switch (config.tx_type) {
+        case HWTSTAMP_TX_OFF:
+                priv->hwts_tx_en = 0;
+                break;
+        case HWTSTAMP_TX_ON:
+                if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
+                        return -ERANGE;
+                priv->hwts_tx_en = 1;
+                break;
+        default:
+                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)
 {
@@ -776,6 +828,9 @@ 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;
 
@@ -978,7 +1033,8 @@ 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 */
@@ -1922,23 +1978,29 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
         struct netdev_queue *txq;
         struct gfar __iomem *regs = NULL;
         struct txfcb *fcb = NULL;
-        struct txbd8 *txbdp, *txbdp_start, *base;
+        struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL;
         u32 lstatus;
-        int i, rq = 0;
+        int i, rq = 0, do_tstamp = 0;
         u32 bufaddr;
         unsigned long flags;
-        unsigned int nr_frags, length;
-
+        unsigned int nr_frags, nr_txbds, length;
+        union skb_shared_tx *shtx;
 
         rq = skb->queue_mapping;
         tx_queue = priv->tx_queue[rq];
         txq = netdev_get_tx_queue(dev, rq);
         base = tx_queue->tx_bd_base;
         regs = tx_queue->grp->regs;
+        shtx = skb_tx(skb);
+
+        /* check if time stamp should be generated */
+        if (unlikely(shtx->hardware && priv->hwts_tx_en))
+                do_tstamp = 1;
 
         /* make space for additional header when fcb is needed */
         if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
-                        (priv->vlgrp && vlan_tx_tag_present(skb))) &&
+                        (priv->vlgrp && vlan_tx_tag_present(skb)) ||
+                        unlikely(do_tstamp)) &&
                         (skb_headroom(skb) < GMAC_FCB_LEN)) {
                 struct sk_buff *skb_new;
 
@@ -1955,8 +2017,14 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
         /* total number of fragments in the SKB */
         nr_frags = skb_shinfo(skb)->nr_frags;
 
+        /* calculate the required number of TxBDs for this skb */
+        if (unlikely(do_tstamp))
+                nr_txbds = nr_frags + 2;
+        else
+                nr_txbds = nr_frags + 1;
+
         /* check if there is space to queue this packet */
-        if ((nr_frags+1) > tx_queue->num_txbdfree) {
+        if (nr_txbds > tx_queue->num_txbdfree) {
                 /* no space, stop the queue */
                 netif_tx_stop_queue(txq);
                 dev->stats.tx_fifo_errors++;
@@ -1968,9 +2036,19 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
         txq->tx_packets ++;
 
         txbdp = txbdp_start = tx_queue->cur_tx;
+        lstatus = txbdp->lstatus;
+
+        /* Time stamp insertion requires one additional TxBD */
+        if (unlikely(do_tstamp))
+                txbdp_tstamp = txbdp = next_txbd(txbdp, base,
+                                tx_queue->tx_ring_size);
 
         if (nr_frags == 0) {
-                lstatus = txbdp->lstatus | BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
+                if (unlikely(do_tstamp))
+                        txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST |
+                                        TXBD_INTERRUPT);
+                else
+                        lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
         } else {
                 /* Place the fragment addresses and lengths into the TxBDs */
                 for (i = 0; i < nr_frags; i++) {
@@ -2016,11 +2094,32 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
                 gfar_tx_vlan(skb, fcb);
         }
 
-        /* setup the TxBD length and buffer pointer for the first BD */
+        /* Setup tx hardware time stamping if requested */
+        if (unlikely(do_tstamp)) {
+                shtx->in_progress = 1;
+                if (fcb == NULL)
+                        fcb = gfar_add_fcb(skb);
+                fcb->ptp = 1;
+                lstatus |= BD_LFLAG(TXBD_TOE);
+        }
+
         txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
                         skb_headlen(skb), DMA_TO_DEVICE);
 
-        lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
+        /*
+         * If time stamping is requested one additional TxBD must be set up. The
+         * first TxBD points to the FCB and must have a data length of
+         * GMAC_FCB_LEN. The second TxBD points to the actual frame data with
+         * the full frame length.
+         */
+        if (unlikely(do_tstamp)) {
+                txbdp_tstamp->bufPtr = txbdp_start->bufPtr + GMAC_FCB_LEN;
+                txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) |
+                                (skb_headlen(skb) - GMAC_FCB_LEN);
+                lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN;
+        } else {
+                lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
+        }
 
         /*
          * We can work in parallel with gfar_clean_tx_ring(), except
@@ -2060,7 +2159,7 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
         tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size);
 
         /* reduce TxBD free count */
-        tx_queue->num_txbdfree -= (nr_frags + 1);
+        tx_queue->num_txbdfree -= (nr_txbds);
 
         dev->trans_start = jiffies;
 
@@ -2251,16 +2350,18 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
         struct net_device *dev = tx_queue->dev;
         struct gfar_private *priv = netdev_priv(dev);
         struct gfar_priv_rx_q *rx_queue = NULL;
-        struct txbd8 *bdp;
+        struct txbd8 *bdp, *next = NULL;
         struct txbd8 *lbdp = NULL;
         struct txbd8 *base = tx_queue->tx_bd_base;
         struct sk_buff *skb;
         int skb_dirtytx;
         int tx_ring_size = tx_queue->tx_ring_size;
-        int frags = 0;
+        int frags = 0, nr_txbds = 0;
         int i;
         int howmany = 0;
         u32 lstatus;
+        size_t buflen;
+        union skb_shared_tx *shtx;
 
         rx_queue = priv->rx_queue[tx_queue->qindex];
         bdp = tx_queue->dirty_tx;
@@ -2270,7 +2371,18 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
                 unsigned long flags;
 
                 frags = skb_shinfo(skb)->nr_frags;
-                lbdp = skip_txbd(bdp, frags, base, tx_ring_size);
+
+                /*
+                 * When time stamping, one additional TxBD must be freed.
+                 * Also, we need to dma_unmap_single() the TxPAL.
+                 */
+                shtx = skb_tx(skb);
+                if (unlikely(shtx->in_progress))
+                        nr_txbds = frags + 2;
+                else
+                        nr_txbds = frags + 1;
+
+                lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size);
 
                 lstatus = lbdp->lstatus;
 
@@ -2279,10 +2391,24 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
                                 (lstatus & BD_LENGTH_MASK))
                         break;
 
-                dma_unmap_single(&priv->ofdev->dev,
-                                bdp->bufPtr,
-                                bdp->length,
-                                DMA_TO_DEVICE);
+                if (unlikely(shtx->in_progress)) {
+                        next = next_txbd(bdp, base, tx_ring_size);
+                        buflen = next->length + GMAC_FCB_LEN;
+                } else
+                        buflen = bdp->length;
+
+                dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
+                                buflen, DMA_TO_DEVICE);
+
+                if (unlikely(shtx->in_progress)) {
+                        struct skb_shared_hwtstamps shhwtstamps;
+                        u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7);
+                        memset(&shhwtstamps, 0, sizeof(shhwtstamps));
+                        shhwtstamps.hwtstamp = ns_to_ktime(*ns);
+                        skb_tstamp_tx(skb, &shhwtstamps);
+                        bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
+                        bdp = next;
+                }
 
                 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
                 bdp = next_txbd(bdp, base, tx_ring_size);
@@ -2314,7 +2440,7 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
 
                 howmany++;
                 spin_lock_irqsave(&tx_queue->txlock, flags);
-                tx_queue->num_txbdfree += frags + 1;
+                tx_queue->num_txbdfree += nr_txbds;
                 spin_unlock_irqrestore(&tx_queue->txlock, flags);
         }
 
@@ -2470,6 +2596,17 @@ 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);
 
@@ -2506,8 +2643,7 @@ 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;
@@ -2794,7 +2930,7 @@ static void adjust_link(struct net_device *dev)
  * whenever dev->flags is changed */
 static void gfar_set_multi(struct net_device *dev)
 {
-        struct dev_mc_list *mc_ptr;
+        struct netdev_hw_addr *ha;
         struct gfar_private *priv = netdev_priv(dev);
         struct gfar __iomem *regs = priv->gfargrp[0].regs;
         u32 tempval;
@@ -2867,13 +3003,12 @@ static void gfar_set_multi(struct net_device *dev)
                         return;
 
                 /* Parse the list, and set the appropriate bits */
-                netdev_for_each_mc_addr(mc_ptr, dev) {
+                netdev_for_each_mc_addr(ha, dev) {
                         if (idx < em_num) {
-                                gfar_set_mac_for_addr(dev, idx,
-                                                mc_ptr->dmi_addr);
+                                gfar_set_mac_for_addr(dev, idx, ha->addr);
                                 idx++;
                         } else
-                                gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr);
+                                gfar_set_hash_for_addr(dev, ha->addr);
                 }
         }