diff options
| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2012-06-13 22:56:59 +0400 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2012-06-19 23:40:20 +0400 |
| commit | 41052ef6dfe90e7639103a010f49d13dadc55a28 (patch) | |
| tree | f0e4a8230dd94ea76f1a7255c10fea6aa708a6f2 /drivers/net/can/vcan.c | |
| parent | 1e0625facab2e871472472b7df87d8fbe6caf75a (diff) | |
| download | linux-41052ef6dfe90e7639103a010f49d13dadc55a28.tar.xz | |
vcan: add CAN FD support
- move the length calculation from dlc to real length (using canfd_frame)
- allow to switch the driver between CAN and CAN FD (change of MTU)
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/vcan.c')
| -rw-r--r-- | drivers/net/can/vcan.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c index ea2d94285936..4f93c0be0053 100644 --- a/drivers/net/can/vcan.c +++ b/drivers/net/can/vcan.c @@ -70,13 +70,12 @@ MODULE_PARM_DESC(echo, "Echo sent frames (for testing). Default: 0 (Off)"); static void vcan_rx(struct sk_buff *skb, struct net_device *dev) { - struct can_frame *cf = (struct can_frame *)skb->data; + struct canfd_frame *cfd = (struct canfd_frame *)skb->data; struct net_device_stats *stats = &dev->stats; stats->rx_packets++; - stats->rx_bytes += cf->can_dlc; + stats->rx_bytes += cfd->len; - skb->protocol = htons(ETH_P_CAN); skb->pkt_type = PACKET_BROADCAST; skb->dev = dev; skb->ip_summed = CHECKSUM_UNNECESSARY; @@ -86,7 +85,7 @@ static void vcan_rx(struct sk_buff *skb, struct net_device *dev) static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) { - struct can_frame *cf = (struct can_frame *)skb->data; + struct canfd_frame *cfd = (struct canfd_frame *)skb->data; struct net_device_stats *stats = &dev->stats; int loop; @@ -94,7 +93,7 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; stats->tx_packets++; - stats->tx_bytes += cf->can_dlc; + stats->tx_bytes += cfd->len; /* set flag whether this packet has to be looped back */ loop = skb->pkt_type == PACKET_LOOPBACK; @@ -108,7 +107,7 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) * CAN core already did the echo for us */ stats->rx_packets++; - stats->rx_bytes += cf->can_dlc; + stats->rx_bytes += cfd->len; } kfree_skb(skb); return NETDEV_TX_OK; @@ -133,14 +132,28 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; } +static int vcan_change_mtu(struct net_device *dev, int new_mtu) +{ + /* Do not allow changing the MTU while running */ + if (dev->flags & IFF_UP) + return -EBUSY; + + if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU) + return -EINVAL; + + dev->mtu = new_mtu; + return 0; +} + static const struct net_device_ops vcan_netdev_ops = { .ndo_start_xmit = vcan_tx, + .ndo_change_mtu = vcan_change_mtu, }; static void vcan_setup(struct net_device *dev) { dev->type = ARPHRD_CAN; - dev->mtu = sizeof(struct can_frame); + dev->mtu = CAN_MTU; dev->hard_header_len = 0; dev->addr_len = 0; dev->tx_queue_len = 0; |