diff options
| author | Maciej Fijalkowski <maciej.fijalkowski@intel.com> | 2023-07-19 15:24:04 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-07-19 09:56:49 -0700 |
| commit | 1b725b0c8163cfd2d9ab22057df46b487981cfea (patch) | |
| tree | 3b92e06efa2c2df4f8c6a64c74f14c9ae2c87416 /include/net/xsk_buff_pool.h | |
| parent | b7f72a30e9ac2555b05afc6cfddc9dbc98e1eb8d (diff) | |
xsk: allow core/drivers to test EOP bit
Drivers are used to check for EOP bit whereas AF_XDP operates on
inverted logic - user space indicates that current frag is not the last
one and packet continues. For AF_XDP core needs, add xp_mb_desc() that
will simply test XDP_PKT_CONTD from xdp_desc::options, but in order to
preserve drivers default behavior, introduce an interface for ZC drivers
that will negate xp_mb_desc() result and therefore make it easier to
test EOP bit from during production of HW Tx descriptors.
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230719132421.584801-8-maciej.fijalkowski@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net/xsk_buff_pool.h')
| -rw-r--r-- | include/net/xsk_buff_pool.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/xsk_buff_pool.h b/include/net/xsk_buff_pool.h index a8d7b8a3688a..4dcca163e076 100644 --- a/include/net/xsk_buff_pool.h +++ b/include/net/xsk_buff_pool.h @@ -184,6 +184,11 @@ static inline bool xp_desc_crosses_non_contig_pg(struct xsk_buff_pool *pool, !(pool->dma_pages[addr >> PAGE_SHIFT] & XSK_NEXT_PG_CONTIG_MASK); } +static inline bool xp_mb_desc(struct xdp_desc *desc) +{ + return desc->options & XDP_PKT_CONTD; +} + static inline u64 xp_aligned_extract_addr(struct xsk_buff_pool *pool, u64 addr) { return addr & pool->chunk_mask; |