diff options
| author |   Björn Töpel <bjorn.topel@intel.com> | 2018-08-28 14:44:32 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-08-29 12:25:53 -0700 |
| commit | 0a714186d3c0f7c563a03537f98716457c1f5ae0 (patch) | |
| tree | 88e7c8fa045cce01f5b5c4b7aa69ca0ed090aa87 /drivers/net/ethernet/intel/i40e/i40e_txrx.h | |
| parent | i40e: move common Rx functions to i40e_txrx_common.h (diff) | |
| download | linux-dev-0a714186d3c0f7c563a03537f98716457c1f5ae0.tar.xz linux-dev-0a714186d3c0f7c563a03537f98716457c1f5ae0.zip | |
i40e: add AF_XDP zero-copy Rx support
This patch adds zero-copy Rx support for AF_XDP sockets. Instead of
allocating buffers of type MEM_TYPE_PAGE_SHARED, the Rx frames are
allocated as MEM_TYPE_ZERO_COPY when AF_XDP is enabled for a certain
queue.
All AF_XDP specific functions are added to a new file, i40e_xsk.c.
Note that when AF_XDP zero-copy is enabled, the XDP action XDP_PASS
will allocate a new buffer and copy the zero-copy frame prior passing
it to the kernel stack.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_txrx.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.h | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index bb04f6a731fe..100e92d2982f 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -296,13 +296,17 @@ struct i40e_tx_buffer { struct i40e_rx_buffer { dma_addr_t dma; - struct page *page; -#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536) - __u32 page_offset; -#else - __u16 page_offset; -#endif - __u16 pagecnt_bias; + union { + struct { + struct page *page; + __u32 page_offset; + __u16 pagecnt_bias; + }; + struct { + void *addr; + u64 handle; + }; + }; }; struct i40e_queue_stats { @@ -414,6 +418,8 @@ struct i40e_ring { struct i40e_channel *ch; struct xdp_rxq_info xdp_rxq; + struct xdp_umem *xsk_umem; + struct zero_copy_allocator zca; /* ZC allocator anchor */ } ____cacheline_internodealigned_in_smp; static inline bool ring_uses_build_skb(struct i40e_ring *ring) |