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/* SPDX-License-Identifier: GPL-2.0 */
/* XDP user-space packet buffer
 * Copyright(c) 2018 Intel Corporation.
 */

#ifndef XDP_UMEM_H_
#define XDP_UMEM_H_

#include <linux/mm.h>
#include <linux/if_xdp.h>
#include <linux/workqueue.h>

#include "xsk_queue.h"
#include "xdp_umem_props.h"

struct xdp_umem {
	struct xsk_queue *fq;
	struct xsk_queue *cq;
	struct page **pgs;
	struct xdp_umem_props props;
	u32 headroom;
	u32 chunk_size_nohr;
	struct user_struct *user;
	struct pid *pid;
	unsigned long address;
	refcount_t users;
	struct work_struct work;
	u32 npgs;
};

static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
{
	return page_address(umem->pgs[addr >> PAGE_SHIFT]) +
		(addr & (PAGE_SIZE - 1));
}

bool xdp_umem_validate_queues(struct xdp_umem *umem);
void xdp_get_umem(struct xdp_umem *umem);
void xdp_put_umem(struct xdp_umem *umem);
struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr);

#endif /* XDP_UMEM_H_ */