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1 | /* |
2 | * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #ifndef __MLX5_WQ_H__ | |
34 | #define __MLX5_WQ_H__ | |
35 | ||
36 | #include <linux/mlx5/mlx5_ifc.h> | |
37 | ||
38 | struct mlx5_wq_param { | |
39 | int linear; | |
311c7c71 SM |
40 | int buf_numa_node; |
41 | int db_numa_node; | |
e586b3b0 AV |
42 | }; |
43 | ||
44 | struct mlx5_wq_ctrl { | |
45 | struct mlx5_core_dev *mdev; | |
46 | struct mlx5_buf buf; | |
47 | struct mlx5_db db; | |
48 | }; | |
49 | ||
50 | struct mlx5_wq_cyc { | |
51 | void *buf; | |
52 | __be32 *db; | |
53 | u16 sz_m1; | |
54 | u8 log_stride; | |
55 | }; | |
56 | ||
57 | struct mlx5_cqwq { | |
58 | void *buf; | |
59 | __be32 *db; | |
60 | u32 sz_m1; | |
61 | u32 cc; /* consumer counter */ | |
62 | u8 log_sz; | |
63 | u8 log_stride; | |
64 | }; | |
65 | ||
66 | struct mlx5_wq_ll { | |
67 | void *buf; | |
68 | __be32 *db; | |
69 | __be16 *tail_next; | |
70 | u16 sz_m1; | |
71 | u16 head; | |
72 | u16 wqe_ctr; | |
73 | u16 cur_sz; | |
74 | u8 log_stride; | |
75 | }; | |
76 | ||
77 | int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, | |
78 | void *wqc, struct mlx5_wq_cyc *wq, | |
79 | struct mlx5_wq_ctrl *wq_ctrl); | |
80 | u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq); | |
81 | ||
82 | int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, | |
83 | void *cqc, struct mlx5_cqwq *wq, | |
84 | struct mlx5_wq_ctrl *wq_ctrl); | |
85 | u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq); | |
86 | ||
87 | int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, | |
88 | void *wqc, struct mlx5_wq_ll *wq, | |
89 | struct mlx5_wq_ctrl *wq_ctrl); | |
90 | u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq); | |
91 | ||
92 | void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl); | |
93 | ||
94 | static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr) | |
95 | { | |
96 | return ctr & wq->sz_m1; | |
97 | } | |
98 | ||
99 | static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix) | |
100 | { | |
101 | return wq->buf + (ix << wq->log_stride); | |
102 | } | |
103 | ||
104 | static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2) | |
105 | { | |
106 | int equal = (cc1 == cc2); | |
107 | int smaller = 0x8000 & (cc1 - cc2); | |
108 | ||
109 | return !equal && !smaller; | |
110 | } | |
111 | ||
112 | static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq) | |
113 | { | |
114 | return wq->cc & wq->sz_m1; | |
115 | } | |
116 | ||
117 | static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix) | |
118 | { | |
119 | return wq->buf + (ix << wq->log_stride); | |
120 | } | |
121 | ||
122 | static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq) | |
123 | { | |
124 | return wq->cc >> wq->log_sz; | |
125 | } | |
126 | ||
127 | static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq) | |
128 | { | |
129 | wq->cc++; | |
130 | } | |
131 | ||
132 | static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq) | |
133 | { | |
134 | *wq->db = cpu_to_be32(wq->cc & 0xffffff); | |
135 | } | |
136 | ||
137 | static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq) | |
138 | { | |
139 | return wq->cur_sz == wq->sz_m1; | |
140 | } | |
141 | ||
142 | static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq) | |
143 | { | |
144 | return !wq->cur_sz; | |
145 | } | |
146 | ||
147 | static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix) | |
148 | { | |
149 | return wq->buf + (ix << wq->log_stride); | |
150 | } | |
151 | ||
152 | static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next) | |
153 | { | |
154 | wq->head = head_next; | |
155 | wq->wqe_ctr++; | |
156 | wq->cur_sz++; | |
157 | } | |
158 | ||
159 | static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix, | |
160 | __be16 *next_tail_next) | |
161 | { | |
162 | *wq->tail_next = ix; | |
163 | wq->tail_next = next_tail_next; | |
164 | wq->cur_sz--; | |
165 | } | |
166 | ||
167 | static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq) | |
168 | { | |
169 | *wq->db = cpu_to_be32(wq->wqe_ctr); | |
170 | } | |
171 | ||
172 | #endif /* __MLX5_WQ_H__ */ |