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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_ */
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