| /* 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 |