diff options
| author |   Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> | 2018-01-07 11:36:39 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-01-08 13:58:49 -0500 |
| commit | 5eb5f8608ef118c2cfefc10c8dbbb89b14fac506 (patch) | |
| tree | f73dba8f0a63a2f72d517c77535a1f484673ea1d /drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | |
| parent | net: qualcomm: rmnet: Handle command packets with checksum trailer (diff) | |
| download | linux-dev-5eb5f8608ef118c2cfefc10c8dbbb89b14fac506.tar.xz linux-dev-5eb5f8608ef118c2cfefc10c8dbbb89b14fac506.zip | |
net: qualcomm: rmnet: Add support for TX checksum offload
TX checksum offload applies to TCP / UDP packets which are not
fragmented using the MAPv4 checksum trailer. The following needs to be
done to have checksum computed in hardware -
1. Set the checksum start offset and inset offset.
2. Set the csum_enabled bit
3. Compute and set 1's complement of partial checksum field in
transport header.
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c')
| -rw-r--r-- | drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c index 340945857d23..601edec28c5f 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c @@ -141,11 +141,19 @@ static int rmnet_map_egress_handler(struct sk_buff *skb, additional_header_len = 0; required_headroom = sizeof(struct rmnet_map_header); + if (port->data_format & RMNET_EGRESS_FORMAT_MAP_CKSUMV4) { + additional_header_len = sizeof(struct rmnet_map_ul_csum_header); + required_headroom += additional_header_len; + } + if (skb_headroom(skb) < required_headroom) { if (pskb_expand_head(skb, required_headroom, 0, GFP_KERNEL)) goto fail; } + if (port->data_format & RMNET_EGRESS_FORMAT_MAP_CKSUMV4) + rmnet_map_checksum_uplink_packet(skb, orig_dev); + map_header = rmnet_map_add_map_header(skb, additional_header_len, 0); if (!map_header) goto fail; |