forked from Minki/linux
d3b42f1422
Introduce refcount_t, in favor of atomic_t. Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* XDP user-space packet buffer
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* Copyright(c) 2018 Intel Corporation.
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*/
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#ifndef XDP_UMEM_H_
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#define XDP_UMEM_H_
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#include <linux/mm.h>
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#include <linux/if_xdp.h>
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#include <linux/workqueue.h>
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#include "xsk_queue.h"
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#include "xdp_umem_props.h"
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struct xdp_umem {
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struct xsk_queue *fq;
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struct xsk_queue *cq;
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struct page **pgs;
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struct xdp_umem_props props;
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u32 npgs;
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u32 frame_headroom;
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u32 nfpp_mask;
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u32 nfpplog2;
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u32 frame_size_log2;
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struct user_struct *user;
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struct pid *pid;
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unsigned long address;
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size_t size;
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refcount_t users;
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struct work_struct work;
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};
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static inline char *xdp_umem_get_data(struct xdp_umem *umem, u32 idx)
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{
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u64 pg, off;
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char *data;
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pg = idx >> umem->nfpplog2;
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off = (idx & umem->nfpp_mask) << umem->frame_size_log2;
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data = page_address(umem->pgs[pg]);
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return data + off;
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}
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static inline char *xdp_umem_get_data_with_headroom(struct xdp_umem *umem,
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u32 idx)
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{
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return xdp_umem_get_data(umem, idx) + umem->frame_headroom;
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}
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bool xdp_umem_validate_queues(struct xdp_umem *umem);
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void xdp_get_umem(struct xdp_umem *umem);
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void xdp_put_umem(struct xdp_umem *umem);
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struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr);
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#endif /* XDP_UMEM_H_ */
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