diff options
Diffstat (limited to 'drivers/net/ibmveth.c')
| -rw-r--r-- | drivers/net/ibmveth.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c index 0c35d72f5f8..9353890dcda 100644 --- a/drivers/net/ibmveth.c +++ b/drivers/net/ibmveth.c @@ -47,6 +47,8 @@ #include <linux/mm.h> #include <linux/ethtool.h> #include <linux/proc_fs.h> +#include <linux/in.h> +#include <linux/ip.h> #include <net/net_namespace.h> #include <asm/semaphore.h> #include <asm/hvcall.h> @@ -132,6 +134,11 @@ static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); } +static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) +{ + return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].csum_good); +} + /* setup the initial settings for a buffer pool */ static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active) { @@ -695,6 +702,24 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) desc[0].fields.length, DMA_TO_DEVICE); desc[0].fields.valid = 1; + if (skb->ip_summed == CHECKSUM_PARTIAL && + ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { + ibmveth_error_printk("tx: failed to checksum packet\n"); + tx_dropped++; + goto out; + } + + if (skb->ip_summed == CHECKSUM_PARTIAL) { + unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; + + desc[0].fields.no_csum = 1; + desc[0].fields.csum_good = 1; + + /* Need to zero out the checksum */ + buf[0] = 0; + buf[1] = 0; + } + if(dma_mapping_error(desc[0].fields.address)) { ibmveth_error_printk("tx: unable to map initial fragment\n"); tx_map_failed++; @@ -713,6 +738,10 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) frag->size, DMA_TO_DEVICE); desc[curfrag+1].fields.length = frag->size; desc[curfrag+1].fields.valid = 1; + if (skb->ip_summed == CHECKSUM_PARTIAL) { + desc[curfrag+1].fields.no_csum = 1; + desc[curfrag+1].fields.csum_good = 1; + } if(dma_mapping_error(desc[curfrag+1].fields.address)) { ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag); @@ -801,7 +830,11 @@ static int ibmveth_poll(struct napi_struct *napi, int budget) } else { int length = ibmveth_rxq_frame_length(adapter); int offset = ibmveth_rxq_frame_offset(adapter); + int csum_good = ibmveth_rxq_csum_good(adapter); + skb = ibmveth_rxq_get_buffer(adapter); + if (csum_good) + skb->ip_summed = CHECKSUM_UNNECESSARY; ibmveth_rxq_harvest_buffer(adapter); @@ -962,8 +995,10 @@ static void ibmveth_poll_controller(struct net_device *dev) static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) { int rc, i; + long ret; struct net_device *netdev; struct ibmveth_adapter *adapter; + union ibmveth_illan_attributes set_attr, ret_attr; unsigned char *mac_addr_p; unsigned int *mcastFilterSize_p; @@ -1057,6 +1092,24 @@ static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_ ibmveth_debug_printk("registering netdev...\n"); + ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc); + + if (ret == H_SUCCESS && !ret_attr.fields.active_trunk && + !ret_attr.fields.trunk_priority && + ret_attr.fields.csum_offload_padded_pkt_support) { + set_attr.desc = 0; + set_attr.fields.tcp_csum_offload_ipv4 = 1; + + ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc, + &ret_attr.desc); + + if (ret == H_SUCCESS) + netdev->features |= NETIF_F_IP_CSUM; + else + ret = h_illan_attributes(dev->unit_address, set_attr.desc, + 0, &ret_attr.desc); + } + rc = register_netdev(netdev); if(rc) { |