diff options
| author |   Maxim Mikityanskiy <maximmi@mellanox.com> | 2019-06-26 17:35:28 +0300 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-06-27 22:53:27 +0200 |
| commit | 4bce4e5cb65587f805655ec6808a20af2036627a (patch) | |
| tree | 63e7a79a5c4f01211599c1b6a027234c9754fb54 /drivers/net/ethernet/intel/i40e | |
| parent | xsk: Change the default frame size to 4096 and allow controlling it (diff) | |
| download | linux-dev-4bce4e5cb65587f805655ec6808a20af2036627a.tar.xz linux-dev-4bce4e5cb65587f805655ec6808a20af2036627a.zip | |
xsk: Return the whole xdp_desc from xsk_umem_consume_tx
Some drivers want to access the data transmitted in order to implement
acceleration features of the NICs. It is also useful in AF_XDP TX flow.
Change the xsk_umem_consume_tx API to return the whole xdp_desc, that
contains the data pointer, length and DMA address, instead of only the
latter two. Adapt the implementation of i40e and ixgbe to this change.
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_xsk.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index 557c565c26fc..32bad014d76c 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -641,8 +641,8 @@ static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget) struct i40e_tx_desc *tx_desc = NULL; struct i40e_tx_buffer *tx_bi; bool work_done = true; + struct xdp_desc desc; dma_addr_t dma; - u32 len; while (budget-- > 0) { if (!unlikely(I40E_DESC_UNUSED(xdp_ring))) { @@ -651,21 +651,23 @@ static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget) break; } - if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &dma, &len)) + if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &desc)) break; - dma_sync_single_for_device(xdp_ring->dev, dma, len, + dma = xdp_umem_get_dma(xdp_ring->xsk_umem, desc.addr); + + dma_sync_single_for_device(xdp_ring->dev, dma, desc.len, DMA_BIDIRECTIONAL); tx_bi = &xdp_ring->tx_bi[xdp_ring->next_to_use]; - tx_bi->bytecount = len; + 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 = build_ctob(I40E_TX_DESC_CMD_ICRC | I40E_TX_DESC_CMD_EOP, - 0, len, 0); + 0, desc.len, 0); xdp_ring->next_to_use++; if (xdp_ring->next_to_use == xdp_ring->count) |