xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xsk: Return the whole xdp_desc from xsk_umem_consume_tx

Browse Source 
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>
This commit is contained in:
Maxim Mikityanskiy
2019-06-26 17:35:28 +03:00
committed by Daniel Borkmann
parent 123e8da1d3
commit 4bce4e5cb6
4 changed files with 22 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
net/xdp/xsk.c
View File

@@ -172,22 +172,18 @@ void xsk_umem_consume_tx_done(struct xdp_umem *umem)
}
EXPORT_SYMBOL(xsk_umem_consume_tx_done);
bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma, u32 *len)
bool xsk_umem_consume_tx(struct xdp_umem *umem, struct xdp_desc *desc)
{
struct xdp_desc desc;
struct xdp_sock *xs;
rcu_read_lock();
list_for_each_entry_rcu(xs, &umem->xsk_list, list) {
if (!xskq_peek_desc(xs->tx, &desc))
if (!xskq_peek_desc(xs->tx, desc))
continue;
if (xskq_produce_addr_lazy(umem->cq, desc.addr))
if (xskq_produce_addr_lazy(umem->cq, desc->addr))
goto out;
*dma = xdp_umem_get_dma(umem, desc.addr);
*len = desc.len;
xskq_discard_desc(xs->tx);
rcu_read_unlock();
return true;