1c1efc2af1
Create and free the buffer pool independently from the umem. Move these operations that are performed on the buffer pool from the umem create and destroy functions to new create and destroy functions just for the buffer pool. This so that in later commits we can instantiate multiple buffer pools per umem when sharing a umem between HW queues and/or devices. We also erradicate the back pointer from the umem to the buffer pool as this will not work when we introduce the possibility to have multiple buffer pools per umem. 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/1598603189-32145-4-git-send-email-magnus.karlsson@intel.com
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright(c) 2019 Intel Corporation. */
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#ifndef XSK_H_
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#define XSK_H_
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/* Masks for xdp_umem_page flags.
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* The low 12-bits of the addr will be 0 since this is the page address, so we
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* can use them for flags.
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*/
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#define XSK_NEXT_PG_CONTIG_SHIFT 0
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#define XSK_NEXT_PG_CONTIG_MASK BIT_ULL(XSK_NEXT_PG_CONTIG_SHIFT)
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/* Flags for the umem flags field.
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*
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* The NEED_WAKEUP flag is 1 due to the reuse of the flags field for public
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* flags. See inlude/uapi/include/linux/if_xdp.h.
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*/
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#define XDP_UMEM_USES_NEED_WAKEUP BIT(1)
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struct xdp_ring_offset_v1 {
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__u64 producer;
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__u64 consumer;
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__u64 desc;
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};
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struct xdp_mmap_offsets_v1 {
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struct xdp_ring_offset_v1 rx;
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struct xdp_ring_offset_v1 tx;
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struct xdp_ring_offset_v1 fr;
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struct xdp_ring_offset_v1 cr;
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};
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/* Nodes are linked in the struct xdp_sock map_list field, and used to
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* track which maps a certain socket reside in.
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*/
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struct xsk_map_node {
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struct list_head node;
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struct xsk_map *map;
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struct xdp_sock **map_entry;
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};
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static inline struct xdp_sock *xdp_sk(struct sock *sk)
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{
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return (struct xdp_sock *)sk;
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}
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bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
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void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
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struct xdp_sock **map_entry);
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int xsk_map_inc(struct xsk_map *map);
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void xsk_map_put(struct xsk_map *map);
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void xsk_clear_pool_at_qid(struct net_device *dev, u16 queue_id);
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int xsk_reg_pool_at_qid(struct net_device *dev, struct xsk_buff_pool *pool,
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u16 queue_id);
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#endif /* XSK_H_ */
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