diff options
| author |   Sunil Goutham <sgoutham@cavium.com> | 2017-05-02 18:36:57 +0530 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-05-02 15:41:22 -0400 |
| commit | e3d06ff9ec9400b93bacf8fa92f3985c9412e282 (patch) | |
| tree | 9533bd0f5e6a6beaf1b9544b99b5199459e5b6b7 /drivers/net/ethernet/cavium/thunder/nicvf_queues.c | |
| parent | net: thunderx: Add support for XDP_TX (diff) | |
| download | linux-dev-e3d06ff9ec9400b93bacf8fa92f3985c9412e282.tar.xz linux-dev-e3d06ff9ec9400b93bacf8fa92f3985c9412e282.zip | |
net: thunderx: Support for XDP header adjustment
When in XDP mode reserve XDP_PACKET_HEADROOM bytes at the start
of receive buffer for XDP program to modify headers and adjust
packet start. Additional code changes done to handle such packets.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nicvf_queues.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c index ec234b626fe3..43428ce760ca 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c @@ -164,6 +164,11 @@ static inline int nicvf_alloc_rcv_buffer(struct nicvf *nic, struct rbdr *rbdr, } nic->rb_page_offset = 0; + + /* Reserve space for header modifications by BPF program */ + if (rbdr->is_xdp) + buf_len += XDP_PACKET_HEADROOM; + /* Check if it's recycled */ if (pgcache) nic->rb_page = pgcache->page; @@ -183,7 +188,7 @@ ret: return -ENOMEM; } if (pgcache) - pgcache->dma_addr = *rbuf; + pgcache->dma_addr = *rbuf + XDP_PACKET_HEADROOM; nic->rb_page_offset += buf_len; } @@ -1575,6 +1580,8 @@ static void nicvf_unmap_rcv_buffer(struct nicvf *nic, u64 dma_addr, */ if (page_ref_count(page) != 1) return; + + len += XDP_PACKET_HEADROOM; /* Receive buffers in XDP mode are mapped from page start */ dma_addr &= PAGE_MASK; } |