1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
2 /* Copyright (C) 2018 Netronome Systems, Inc. */
3
4 #ifndef __NFP_ABI__
5 #define __NFP_ABI__ 1
6
7 #include <linux/types.h>
8
9 #define NFP_MBOX_SYM_NAME "_abi_nfd_pf%u_mbox"
10 #define NFP_MBOX_SYM_MIN_SIZE 16 /* When no data needed */
11
12 #define NFP_MBOX_CMD 0x00
13 #define NFP_MBOX_RET 0x04
14 #define NFP_MBOX_DATA_LEN 0x08
15 #define NFP_MBOX_RESERVED 0x0c
16 #define NFP_MBOX_DATA 0x10
17
18 /**
19 * enum nfp_mbox_cmd - PF mailbox commands
20 *
21 * @NFP_MBOX_NO_CMD: null command
22 * Used to indicate previous command has finished.
23 *
24 * @NFP_MBOX_POOL_GET: get shared buffer pool info/config
25 * Input - struct nfp_shared_buf_pool_id
26 * Output - struct nfp_shared_buf_pool_info_get
27 *
28 * @NFP_MBOX_POOL_SET: set shared buffer pool info/config
29 * Input - struct nfp_shared_buf_pool_info_set
30 * Output - None
31 *
32 * @NFP_MBOX_PCIE_ABM_ENABLE: enable PCIe-side advanced buffer management
33 * Enable advanced buffer management of the PCIe block. If ABM is disabled
34 * PCIe block maintains a very short queue of buffers and does tail drop.
35 * ABM allows more advanced buffering and priority control.
36 * Input - None
37 * Output - None
38 *
39 * @NFP_MBOX_PCIE_ABM_DISABLE: disable PCIe-side advanced buffer management
40 * Input - None
41 * Output - None
42 */
43 enum nfp_mbox_cmd {
44 NFP_MBOX_NO_CMD = 0x00,
45
46 NFP_MBOX_POOL_GET = 0x01,
47 NFP_MBOX_POOL_SET = 0x02,
48
49 NFP_MBOX_PCIE_ABM_ENABLE = 0x03,
50 NFP_MBOX_PCIE_ABM_DISABLE = 0x04,
51 };
52
53 #define NFP_SHARED_BUF_COUNT_SYM_NAME "_abi_nfd_pf%u_sb_cnt"
54 #define NFP_SHARED_BUF_TABLE_SYM_NAME "_abi_nfd_pf%u_sb_tbl"
55
56 /**
57 * struct nfp_shared_buf - NFP shared buffer description
58 * @id: numerical user-visible id of the shared buffer
59 * @size: size in bytes of the buffer
60 * @ingress_pools_count: number of ingress pools
61 * @egress_pools_count: number of egress pools
62 * @ingress_tc_count: number of ingress trafic classes
63 * @egress_tc_count: number of egress trafic classes
64 * @pool_size_unit: pool size may be in credits, each credit is
65 * @pool_size_unit bytes
66 */
67 struct nfp_shared_buf {
68 __le32 id;
69 __le32 size;
70 __le16 ingress_pools_count;
71 __le16 egress_pools_count;
72 __le16 ingress_tc_count;
73 __le16 egress_tc_count;
74
75 __le32 pool_size_unit;
76 };
77
78 /**
79 * struct nfp_shared_buf_pool_id - shared buffer pool identification
80 * @shared_buf: shared buffer id
81 * @pool: pool index
82 */
83 struct nfp_shared_buf_pool_id {
84 __le32 shared_buf;
85 __le32 pool;
86 };
87
88 /**
89 * struct nfp_shared_buf_pool_info_get - struct devlink_sb_pool_info mirror
90 * @pool_type: one of enum devlink_sb_pool_type
91 * @size: pool size in units of SB's @pool_size_unit
92 * @threshold_type: one of enum devlink_sb_threshold_type
93 */
94 struct nfp_shared_buf_pool_info_get {
95 __le32 pool_type;
96 __le32 size;
97 __le32 threshold_type;
98 };
99
100 /**
101 * struct nfp_shared_buf_pool_info_set - packed args of sb_pool_set
102 * @id: pool identification info
103 * @size: pool size in units of SB's @pool_size_unit
104 * @threshold_type: one of enum devlink_sb_threshold_type
105 */
106 struct nfp_shared_buf_pool_info_set {
107 struct nfp_shared_buf_pool_id id;
108 __le32 size;
109 __le32 threshold_type;
110 };
111
112 #endif