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path: root/drivers/net/gianfar.c
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Diffstat (limited to 'drivers/net/gianfar.c')
-rw-r--r--drivers/net/gianfar.c215
1 files changed, 165 insertions, 50 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 4e97ca182997..c6791cd4ee05 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 */
@@ -1288,21 +1344,9 @@ static struct dev_pm_ops gfar_pm_ops = {
#define GFAR_PM_OPS (&gfar_pm_ops)
-static int gfar_legacy_suspend(struct of_device *ofdev, pm_message_t state)
-{
- return gfar_suspend(&ofdev->dev);
-}
-
-static int gfar_legacy_resume(struct of_device *ofdev)
-{
- return gfar_resume(&ofdev->dev);
-}
-
#else
#define GFAR_PM_OPS NULL
-#define gfar_legacy_suspend NULL
-#define gfar_legacy_resume NULL
#endif
@@ -1649,6 +1693,7 @@ static void free_skb_resources(struct gfar_private *priv)
sizeof(struct rxbd8) * priv->total_rx_ring_size,
priv->tx_queue[0]->tx_bd_base,
priv->tx_queue[0]->tx_bd_dma_base);
+ skb_queue_purge(&priv->rx_recycle);
}
void gfar_start(struct net_device *dev)
@@ -1682,7 +1727,7 @@ void gfar_start(struct net_device *dev)
gfar_write(&regs->imask, IMASK_DEFAULT);
}
- dev->trans_start = jiffies;
+ dev->trans_start = jiffies; /* prevent tx timeout */
}
void gfar_configure_coalescing(struct gfar_private *priv,
@@ -1922,23 +1967,29 @@ 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 +2006,14 @@ 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 +2025,19 @@ 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 +2083,32 @@ 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
@@ -2060,9 +2148,7 @@ 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);
-
- dev->trans_start = jiffies;
+ tx_queue->num_txbdfree -= (nr_txbds);
/* If the next BD still needs to be cleaned up, then the bds
are full. We need to tell the kernel to stop sending us stuff. */
@@ -2088,7 +2174,6 @@ static int gfar_close(struct net_device *dev)
disable_napi(priv);
- skb_queue_purge(&priv->rx_recycle);
cancel_work_sync(&priv->reset_task);
stop_gfar(dev);
@@ -2251,16 +2336,18 @@ 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 +2357,18 @@ 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 +2377,24 @@ 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 +2426,7 @@ 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 +2582,17 @@ 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 +2629,7 @@ 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 +2916,7 @@ 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;
@@ -2867,17 +2989,14 @@ 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);
}
}
-
- return;
}
@@ -2918,8 +3037,6 @@ static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
tempval = gfar_read(priv->hash_regs[whichreg]);
tempval |= value;
gfar_write(priv->hash_regs[whichreg], tempval);
-
- return;
}
@@ -3055,8 +3172,6 @@ static struct of_platform_driver gfar_driver = {
.probe = gfar_probe,
.remove = gfar_remove,
- .suspend = gfar_legacy_suspend,
- .resume = gfar_legacy_resume,
.driver.pm = GFAR_PM_OPS,
};