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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2016-2019 Netronome Systems, Inc. */
#ifndef NFP_CCM_H
#define NFP_CCM_H 1
#include <linux/bitmap.h>
#include <linux/skbuff.h>
#include <linux/wait.h>
struct nfp_app;
/* Firmware ABI */
enum nfp_ccm_type {
NFP_CCM_TYPE_BPF_MAP_ALLOC = 1,
NFP_CCM_TYPE_BPF_MAP_FREE = 2,
NFP_CCM_TYPE_BPF_MAP_LOOKUP = 3,
NFP_CCM_TYPE_BPF_MAP_UPDATE = 4,
NFP_CCM_TYPE_BPF_MAP_DELETE = 5,
NFP_CCM_TYPE_BPF_MAP_GETNEXT = 6,
NFP_CCM_TYPE_BPF_MAP_GETFIRST = 7,
NFP_CCM_TYPE_BPF_BPF_EVENT = 8,
__NFP_CCM_TYPE_MAX,
};
#define NFP_CCM_ABI_VERSION 1
struct nfp_ccm_hdr {
u8 type;
u8 ver;
__be16 tag;
};
static inline u8 nfp_ccm_get_type(struct sk_buff *skb)
{
struct nfp_ccm_hdr *hdr;
hdr = (struct nfp_ccm_hdr *)skb->data;
return hdr->type;
}
static inline unsigned int nfp_ccm_get_tag(struct sk_buff *skb)
{
struct nfp_ccm_hdr *hdr;
hdr = (struct nfp_ccm_hdr *)skb->data;
return be16_to_cpu(hdr->tag);
}
/* Implementation */
/**
* struct nfp_ccm - common control message handling
* @app: APP handle
*
* @tag_allocator: bitmap of control message tags in use
* @tag_alloc_next: next tag bit to allocate
* @tag_alloc_last: next tag bit to be freed
*
* @replies: received cmsg replies waiting to be consumed
* @wq: work queue for waiting for cmsg replies
*/
struct nfp_ccm {
struct nfp_app *app;
DECLARE_BITMAP(tag_allocator, U16_MAX + 1);
u16 tag_alloc_next;
u16 tag_alloc_last;
struct sk_buff_head replies;
struct wait_queue_head wq;
};
int nfp_ccm_init(struct nfp_ccm *ccm, struct nfp_app *app);
void nfp_ccm_clean(struct nfp_ccm *ccm);
void nfp_ccm_rx(struct nfp_ccm *ccm, struct sk_buff *skb);
struct sk_buff *
nfp_ccm_communicate(struct nfp_ccm *ccm, struct sk_buff *skb,
enum nfp_ccm_type type, unsigned int reply_size);
#endif
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