diff options
| author |   Thomas Falcon <tlfalcon@linux.vnet.ibm.com> | 2017-10-17 12:36:54 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-19 13:20:31 +0100 |
| commit | 154820563dd4621c78e03e98e70216e832422f8e (patch) | |
| tree | d319663184d274816bc44ca75724bb4da590adad /drivers | |
| parent | tun: relax check on eth_get_headlen() return value (diff) | |
| download | linux-dev-154820563dd4621c78e03e98e70216e832422f8e.tar.xz linux-dev-154820563dd4621c78e03e98e70216e832422f8e.zip | |
ibmvnic: Enable scatter-gather support
This patch enables scatter gather support. Since there is no
HW/FW scatter-gather support at this time, the driver needs to
loop through each fragment and copy it to a contiguous, pre-mapped
buffer entry.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 4bc14a901571..b508877397e1 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1204,9 +1204,28 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) offset = index * adapter->req_mtu; dst = tx_pool->long_term_buff.buff + offset; memset(dst, 0, adapter->req_mtu); - skb_copy_from_linear_data(skb, dst, skb->len); data_dma_addr = tx_pool->long_term_buff.addr + offset; + if (skb_shinfo(skb)->nr_frags) { + int cur, i; + + /* Copy the head */ + skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); + cur = skb_headlen(skb); + + /* Copy the frags */ + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + + memcpy(dst + cur, + page_address(skb_frag_page(frag)) + + frag->page_offset, skb_frag_size(frag)); + cur += skb_frag_size(frag); + } + } else { + skb_copy_from_linear_data(skb, dst, skb->len); + } + tx_pool->consumer_index = (tx_pool->consumer_index + 1) % adapter->req_tx_entries_per_subcrq; @@ -2948,7 +2967,7 @@ static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) adapter->ip_offload_ctrl.large_rx_ipv4 = 0; adapter->ip_offload_ctrl.large_rx_ipv6 = 0; - adapter->netdev->features = NETIF_F_GSO; + adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) adapter->netdev->features |= NETIF_F_IP_CSUM; |