Commit f320460b authored by Magnus Karlsson's avatar Magnus Karlsson Committed by Daniel Borkmann

i40e: Remove unnecessary sw_ring access from xsk Tx

Remove the unnecessary access to the software ring for the AF_XDP
zero-copy driver. This was used to record the length of the packet so
that the driver Tx completion code could sum this up to produce the
total bytes sent. This is now performed during the transmission of the
packet, so no need to record this in the software ring.
Signed-off-by: default avatarMagnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/1605525167-14450-3-git-send-email-magnus.karlsson@gmail.com
parent 90da4b32
......@@ -392,7 +392,6 @@ static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget)
{
unsigned int sent_frames = 0, total_bytes = 0;
struct i40e_tx_desc *tx_desc = NULL;
struct i40e_tx_buffer *tx_bi;
struct xdp_desc desc;
dma_addr_t dma;
......@@ -404,9 +403,6 @@ static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget)
xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma,
desc.len);
tx_bi = &xdp_ring->tx_bi[xdp_ring->next_to_use];
tx_bi->bytecount = desc.len;
tx_desc = I40E_TX_DESC(xdp_ring, xdp_ring->next_to_use);
tx_desc->buffer_addr = cpu_to_le64(dma);
tx_desc->cmd_type_offset_bsz =
......@@ -415,7 +411,7 @@ static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget)
0, desc.len, 0);
sent_frames++;
total_bytes += tx_bi->bytecount;
total_bytes += desc.len;
xdp_ring->next_to_use++;
if (xdp_ring->next_to_use == xdp_ring->count)
......
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