132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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/* Copyright (C) 2016-2019 Netronome Systems, Inc. */
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#ifndef NFP_CCM_H
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#define NFP_CCM_H 1
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#include <linux/bitmap.h>
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#include <linux/skbuff.h>
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#include <linux/wait.h>
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struct nfp_app;
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struct nfp_net;
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/* Firmware ABI */
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enum nfp_ccm_type {
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NFP_CCM_TYPE_BPF_MAP_ALLOC = 1,
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NFP_CCM_TYPE_BPF_MAP_FREE = 2,
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NFP_CCM_TYPE_BPF_MAP_LOOKUP = 3,
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NFP_CCM_TYPE_BPF_MAP_UPDATE = 4,
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NFP_CCM_TYPE_BPF_MAP_DELETE = 5,
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NFP_CCM_TYPE_BPF_MAP_GETNEXT = 6,
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NFP_CCM_TYPE_BPF_MAP_GETFIRST = 7,
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NFP_CCM_TYPE_BPF_BPF_EVENT = 8,
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NFP_CCM_TYPE_CRYPTO_RESET = 9,
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NFP_CCM_TYPE_CRYPTO_ADD = 10,
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NFP_CCM_TYPE_CRYPTO_DEL = 11,
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NFP_CCM_TYPE_CRYPTO_UPDATE = 12,
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__NFP_CCM_TYPE_MAX,
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};
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#define NFP_CCM_ABI_VERSION 1
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#define NFP_CCM_TYPE_REPLY_BIT 7
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#define __NFP_CCM_REPLY(req) (BIT(NFP_CCM_TYPE_REPLY_BIT) | (req))
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struct nfp_ccm_hdr {
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union {
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struct {
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u8 type;
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u8 ver;
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__be16 tag;
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};
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__be32 raw;
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};
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};
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static inline u8 nfp_ccm_get_type(struct sk_buff *skb)
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{
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struct nfp_ccm_hdr *hdr;
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hdr = (struct nfp_ccm_hdr *)skb->data;
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return hdr->type;
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}
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static inline __be16 __nfp_ccm_get_tag(struct sk_buff *skb)
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{
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struct nfp_ccm_hdr *hdr;
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hdr = (struct nfp_ccm_hdr *)skb->data;
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return hdr->tag;
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}
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static inline unsigned int nfp_ccm_get_tag(struct sk_buff *skb)
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{
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return be16_to_cpu(__nfp_ccm_get_tag(skb));
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}
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#define NFP_NET_MBOX_TLV_TYPE GENMASK(31, 16)
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#define NFP_NET_MBOX_TLV_LEN GENMASK(15, 0)
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enum nfp_ccm_mbox_tlv_type {
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NFP_NET_MBOX_TLV_TYPE_UNKNOWN = 0,
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NFP_NET_MBOX_TLV_TYPE_END = 1,
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NFP_NET_MBOX_TLV_TYPE_MSG = 2,
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NFP_NET_MBOX_TLV_TYPE_MSG_NOSUP = 3,
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NFP_NET_MBOX_TLV_TYPE_RESV = 4,
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};
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/* Implementation */
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/**
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* struct nfp_ccm - common control message handling
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* @app: APP handle
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*
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* @tag_allocator: bitmap of control message tags in use
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* @tag_alloc_next: next tag bit to allocate
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* @tag_alloc_last: next tag bit to be freed
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*
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* @replies: received cmsg replies waiting to be consumed
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* @wq: work queue for waiting for cmsg replies
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*/
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struct nfp_ccm {
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struct nfp_app *app;
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DECLARE_BITMAP(tag_allocator, U16_MAX + 1);
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u16 tag_alloc_next;
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u16 tag_alloc_last;
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struct sk_buff_head replies;
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wait_queue_head_t wq;
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};
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int nfp_ccm_init(struct nfp_ccm *ccm, struct nfp_app *app);
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void nfp_ccm_clean(struct nfp_ccm *ccm);
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void nfp_ccm_rx(struct nfp_ccm *ccm, struct sk_buff *skb);
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struct sk_buff *
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nfp_ccm_communicate(struct nfp_ccm *ccm, struct sk_buff *skb,
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enum nfp_ccm_type type, unsigned int reply_size);
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int nfp_ccm_mbox_alloc(struct nfp_net *nn);
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void nfp_ccm_mbox_free(struct nfp_net *nn);
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int nfp_ccm_mbox_init(struct nfp_net *nn);
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void nfp_ccm_mbox_clean(struct nfp_net *nn);
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bool nfp_ccm_mbox_fits(struct nfp_net *nn, unsigned int size);
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struct sk_buff *
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nfp_ccm_mbox_msg_alloc(struct nfp_net *nn, unsigned int req_size,
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unsigned int reply_size, gfp_t flags);
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int __nfp_ccm_mbox_communicate(struct nfp_net *nn, struct sk_buff *skb,
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enum nfp_ccm_type type,
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unsigned int reply_size,
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unsigned int max_reply_size, bool critical);
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int nfp_ccm_mbox_communicate(struct nfp_net *nn, struct sk_buff *skb,
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enum nfp_ccm_type type,
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unsigned int reply_size,
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unsigned int max_reply_size);
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int nfp_ccm_mbox_post(struct nfp_net *nn, struct sk_buff *skb,
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enum nfp_ccm_type type, unsigned int max_reply_size);
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#endif
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