projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| bcf0cafa JK |
1 | /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ |
| 2 | /* Copyright (C) 2016-2019 Netronome Systems, Inc. */ | |
| 3 | ||
| 4 | #ifndef NFP_CCM_H | |
| 5 | #define NFP_CCM_H 1 | |
| 6 | ||
| 7 | #include <linux/bitmap.h> | |
| 8 | #include <linux/skbuff.h> | |
| 9 | #include <linux/wait.h> | |
| 10 | ||
| 11 | struct nfp_app; | |
| 12 | ||
| 13 | /* Firmware ABI */ | |
| 14 | ||
| 15 | enum nfp_ccm_type { | |
| 16 | NFP_CCM_TYPE_BPF_MAP_ALLOC = 1, | |
| 17 | NFP_CCM_TYPE_BPF_MAP_FREE = 2, | |
| 18 | NFP_CCM_TYPE_BPF_MAP_LOOKUP = 3, | |
| 19 | NFP_CCM_TYPE_BPF_MAP_UPDATE = 4, | |
| 20 | NFP_CCM_TYPE_BPF_MAP_DELETE = 5, | |
| 21 | NFP_CCM_TYPE_BPF_MAP_GETNEXT = 6, | |
| 22 | NFP_CCM_TYPE_BPF_MAP_GETFIRST = 7, | |
| 23 | NFP_CCM_TYPE_BPF_BPF_EVENT = 8, | |
| 24 | __NFP_CCM_TYPE_MAX, | |
| 25 | }; | |
| 26 | ||
| 27 | #define NFP_CCM_ABI_VERSION 1 | |
| 28 | ||
| 29 | struct nfp_ccm_hdr { | |
| 30 | u8 type; | |
| 31 | u8 ver; | |
| 32 | __be16 tag; | |
| 33 | }; | |
| 34 | ||
| 35 | static inline u8 nfp_ccm_get_type(struct sk_buff *skb) | |
| 36 | { | |
| 37 | struct nfp_ccm_hdr *hdr; | |
| 38 | ||
| 39 | hdr = (struct nfp_ccm_hdr *)skb->data; | |
| 40 | ||
| 41 | return hdr->type; | |
| 42 | } | |
| 43 | ||
| 44 | static inline unsigned int nfp_ccm_get_tag(struct sk_buff *skb) | |
| 45 | { | |
| 46 | struct nfp_ccm_hdr *hdr; | |
| 47 | ||
| 48 | hdr = (struct nfp_ccm_hdr *)skb->data; | |
| 49 | ||
| 50 | return be16_to_cpu(hdr->tag); | |
| 51 | } | |
| 52 | ||
| 53 | /* Implementation */ | |
| 54 | ||
| 55 | /** | |
| 56 | * struct nfp_ccm - common control message handling | |
| 6c9f0544 JK |
57 | * @app: APP handle |
| 58 | * | |
| bcf0cafa JK |
59 | * @tag_allocator: bitmap of control message tags in use |
| 60 | * @tag_alloc_next: next tag bit to allocate | |
| 61 | * @tag_alloc_last: next tag bit to be freed | |
| 62 | * | |
| 63 | * @replies: received cmsg replies waiting to be consumed | |
| 64 | * @wq: work queue for waiting for cmsg replies | |
| 65 | */ | |
| 66 | struct nfp_ccm { | |
| 67 | struct nfp_app *app; | |
| 68 | ||
| 69 | DECLARE_BITMAP(tag_allocator, U16_MAX + 1); | |
| 70 | u16 tag_alloc_next; | |
| 71 | u16 tag_alloc_last; | |
| 72 | ||
| 73 | struct sk_buff_head replies; | |
| 74 | struct wait_queue_head wq; | |
| 75 | }; | |
| 76 | ||
| 77 | int nfp_ccm_init(struct nfp_ccm *ccm, struct nfp_app *app); | |
| 78 | void nfp_ccm_clean(struct nfp_ccm *ccm); | |
| 79 | void nfp_ccm_rx(struct nfp_ccm *ccm, struct sk_buff *skb); | |
| 80 | struct sk_buff * | |
| 81 | nfp_ccm_communicate(struct nfp_ccm *ccm, struct sk_buff *skb, | |
| 82 | enum nfp_ccm_type type, unsigned int reply_size); | |
| 83 | #endif |