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132 lines
3.4 KiB
132 lines
3.4 KiB
/* 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_CRYPTO_RESYNC = 13, |
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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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