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xsk: i40e: ice: ixgbe: mlx5: Pass buffer pool to driver instead of umem

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Replace the explicit umem reference passed to the driver in AF_XDP
zero-copy mode with the buffer pool instead. This in preparation for
extending the functionality of the zero-copy mode so that umems can be
shared between queues on the same netdev and also between netdevs. In
this commit, only an umem reference has been added to the buffer pool
struct. But later commits will add other entities to it. These are
going to be entities that are different between different queue ids
and netdevs even though the umem is shared between them.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/1598603189-32145-2-git-send-email-magnus.karlsson@intel.com
This commit is contained in:
Magnus Karlsson 2020-08-28 10:26:15 +02:00 • committed by Daniel Borkmann
parent 29523c5e67
commit 1742b3d528
40 changed files with 413 additions and 398 deletions
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10
include/linux/netdevice.h
View file

@ -618,7 +618,7 @@ struct netdev_queue {
/* Subordinate device that the queue has been assigned to */
struct net_device *sb_dev;
#ifdef CONFIG_XDP_SOCKETS
struct xdp_umem *umem;
struct xsk_buff_pool *pool;
#endif
/*
* write-mostly part
@ -751,7 +751,7 @@ struct netdev_rx_queue {
struct net_device *dev;
struct xdp_rxq_info xdp_rxq;
#ifdef CONFIG_XDP_SOCKETS
struct xdp_umem *umem;
struct xsk_buff_pool *pool;
#endif
} ____cacheline_aligned_in_smp;
@ -879,7 +879,7 @@ enum bpf_netdev_command {
/* BPF program for offload callbacks, invoked at program load time. */
BPF_OFFLOAD_MAP_ALLOC,
BPF_OFFLOAD_MAP_FREE,
XDP_SETUP_XSK_UMEM,
XDP_SETUP_XSK_POOL,
};
struct bpf_prog_offload_ops;
@ -913,9 +913,9 @@ struct netdev_bpf {
struct {
struct bpf_offloaded_map *offmap;
};
/* XDP_SETUP_XSK_UMEM */
/* XDP_SETUP_XSK_POOL */
struct {
struct xdp_umem *umem;
struct xsk_buff_pool *pool;
u16 queue_id;
} xsk;
};