linux/drivers/net/ethernet/netronome/nfp/ccm.h

/* 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 …

#include <linux/bitmap.h>
#include <linux/skbuff.h>
#include <linux/wait.h>

struct nfp_app;
struct nfp_net;

/* Firmware ABI */

enum nfp_ccm_type { … };

#define NFP_CCM_ABI_VERSION …

#define NFP_CCM_TYPE_REPLY_BIT …
#define __NFP_CCM_REPLY(req) …

struct nfp_ccm_hdr { … };

static inline u8 nfp_ccm_get_type(struct sk_buff *skb)
{ … }

static inline __be16 __nfp_ccm_get_tag(struct sk_buff *skb)
{ … }

static inline unsigned int nfp_ccm_get_tag(struct sk_buff *skb)
{ … }

#define NFP_NET_MBOX_TLV_TYPE …
#define NFP_NET_MBOX_TLV_LEN …

enum nfp_ccm_mbox_tlv_type { … };

/* 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 { … };

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);

int nfp_ccm_mbox_alloc(struct nfp_net *nn);
void nfp_ccm_mbox_free(struct nfp_net *nn);
int nfp_ccm_mbox_init(struct nfp_net *nn);
void nfp_ccm_mbox_clean(struct nfp_net *nn);
bool nfp_ccm_mbox_fits(struct nfp_net *nn, unsigned int size);
struct sk_buff *
nfp_ccm_mbox_msg_alloc(struct nfp_net *nn, unsigned int req_size,
		       unsigned int reply_size, gfp_t flags);
int __nfp_ccm_mbox_communicate(struct nfp_net *nn, struct sk_buff *skb,
			       enum nfp_ccm_type type,
			       unsigned int reply_size,
			       unsigned int max_reply_size, bool critical);
int nfp_ccm_mbox_communicate(struct nfp_net *nn, struct sk_buff *skb,
			     enum nfp_ccm_type type,
			     unsigned int reply_size,
			     unsigned int max_reply_size);
int nfp_ccm_mbox_post(struct nfp_net *nn, struct sk_buff *skb,
		      enum nfp_ccm_type type, unsigned int max_reply_size);
#endif