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| author |   Maxim Mikityanskiy <maximmi@mellanox.com> | 2019-06-26 17:35:24 +0300 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-06-27 22:53:26 +0200 |
| commit | d57d76428ae9abca51fb89f9326da9d4b1cf8270 (patch) | |
| tree | 4beba613d02a1578704d6b7eea7633648e5d7b59 /include/net/xdp_sock.h | |
| parent | net/mlx5e: Attach/detach XDP program safely (diff) | |
| download | wireguard-linux-d57d76428ae9abca51fb89f9326da9d4b1cf8270.tar.xz wireguard-linux-d57d76428ae9abca51fb89f9326da9d4b1cf8270.zip | |
xsk: Add API to check for available entries in FQ
Add a function that checks whether the Fill Ring has the specified
amount of descriptors available. It will be useful for mlx5e that wants
to check in advance, whether it can allocate a bulk of RX descriptors,
to get the best performance.
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include/net/xdp_sock.h')
| -rw-r--r-- | include/net/xdp_sock.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h index ae0f368a62bb..b6f5ebae43a1 100644 --- a/include/net/xdp_sock.h +++ b/include/net/xdp_sock.h @@ -77,6 +77,7 @@ int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp); void xsk_flush(struct xdp_sock *xs); bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs); /* Used from netdev driver */ +bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt); u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr); void xsk_umem_discard_addr(struct xdp_umem *umem); void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries); @@ -99,6 +100,16 @@ static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr) } /* Reuse-queue aware version of FILL queue helpers */ +static inline bool xsk_umem_has_addrs_rq(struct xdp_umem *umem, u32 cnt) +{ + struct xdp_umem_fq_reuse *rq = umem->fq_reuse; + + if (rq->length >= cnt) + return true; + + return xsk_umem_has_addrs(umem, cnt - rq->length); +} + static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr) { struct xdp_umem_fq_reuse *rq = umem->fq_reuse; @@ -146,6 +157,11 @@ static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs) return false; } +static inline bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt) +{ + return false; +} + static inline u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr) { return NULL; @@ -200,6 +216,11 @@ static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr) return 0; } +static inline bool xsk_umem_has_addrs_rq(struct xdp_umem *umem, u32 cnt) +{ + return false; +} + static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr) { return NULL; |