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e586b3b0 AV |
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; | |
40 | int numa; | |
41 | }; | |
42 | ||
43 | struct mlx5_wq_ctrl { | |
44 | struct mlx5_core_dev *mdev; | |
45 | struct mlx5_buf buf; | |
46 | struct mlx5_db db; | |
47 | }; | |
48 | ||
49 | struct mlx5_wq_cyc { | |
50 | void *buf; | |
51 | __be32 *db; | |
52 | u16 sz_m1; | |
53 | u8 log_stride; | |
54 | }; | |
55 | ||
56 | struct mlx5_cqwq { | |
57 | void *buf; | |
58 | __be32 *db; | |
59 | u32 sz_m1; | |
60 | u32 cc; /* consumer counter */ | |
61 | u8 log_sz; | |
62 | u8 log_stride; | |
63 | }; | |
64 | ||
65 | struct mlx5_wq_ll { | |
66 | void *buf; | |
67 | __be32 *db; | |
68 | __be16 *tail_next; | |
69 | u16 sz_m1; | |
70 | u16 head; | |
71 | u16 wqe_ctr; | |
72 | u16 cur_sz; | |
73 | u8 log_stride; | |
74 | }; | |
75 | ||
76 | int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, | |
77 | void *wqc, struct mlx5_wq_cyc *wq, | |
78 | struct mlx5_wq_ctrl *wq_ctrl); | |
79 | u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq); | |
80 | ||
81 | int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, | |
82 | void *cqc, struct mlx5_cqwq *wq, | |
83 | struct mlx5_wq_ctrl *wq_ctrl); | |
84 | u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq); | |
85 | ||
86 | int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, | |
87 | void *wqc, struct mlx5_wq_ll *wq, | |
88 | struct mlx5_wq_ctrl *wq_ctrl); | |
89 | u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq); | |
90 | ||
91 | void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl); | |
92 | ||
93 | static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr) | |
94 | { | |
95 | return ctr & wq->sz_m1; | |
96 | } | |
97 | ||
98 | static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix) | |
99 | { | |
100 | return wq->buf + (ix << wq->log_stride); | |
101 | } | |
102 | ||
103 | static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2) | |
104 | { | |
105 | int equal = (cc1 == cc2); | |
106 | int smaller = 0x8000 & (cc1 - cc2); | |
107 | ||
108 | return !equal && !smaller; | |
109 | } | |
110 | ||
111 | static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq) | |
112 | { | |
113 | return wq->cc & wq->sz_m1; | |
114 | } | |
115 | ||
116 | static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix) | |
117 | { | |
118 | return wq->buf + (ix << wq->log_stride); | |
119 | } | |
120 | ||
121 | static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq) | |
122 | { | |
123 | return wq->cc >> wq->log_sz; | |
124 | } | |
125 | ||
126 | static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq) | |
127 | { | |
128 | wq->cc++; | |
129 | } | |
130 | ||
131 | static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq) | |
132 | { | |
133 | *wq->db = cpu_to_be32(wq->cc & 0xffffff); | |
134 | } | |
135 | ||
136 | static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq) | |
137 | { | |
138 | return wq->cur_sz == wq->sz_m1; | |
139 | } | |
140 | ||
141 | static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq) | |
142 | { | |
143 | return !wq->cur_sz; | |
144 | } | |
145 | ||
146 | static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix) | |
147 | { | |
148 | return wq->buf + (ix << wq->log_stride); | |
149 | } | |
150 | ||
151 | static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next) | |
152 | { | |
153 | wq->head = head_next; | |
154 | wq->wqe_ctr++; | |
155 | wq->cur_sz++; | |
156 | } | |
157 | ||
158 | static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix, | |
159 | __be16 *next_tail_next) | |
160 | { | |
161 | *wq->tail_next = ix; | |
162 | wq->tail_next = next_tail_next; | |
163 | wq->cur_sz--; | |
164 | } | |
165 | ||
166 | static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq) | |
167 | { | |
168 | *wq->db = cpu_to_be32(wq->wqe_ctr); | |
169 | } | |
170 | ||
171 | #endif /* __MLX5_WQ_H__ */ |