1 /*-
2 * Copyright (c) 2013-2017, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28 #ifndef __MLX5_WQ_H__
29 #define __MLX5_WQ_H__
30
31 #include <dev/mlx5/mlx5_ifc.h>
32
33 struct mlx5_wq_param {
34 int linear;
35 int buf_numa_node;
36 int db_numa_node;
37 };
38
39 struct mlx5_wq_ctrl {
40 struct mlx5_core_dev *mdev;
41 struct mlx5_buf buf;
42 struct mlx5_db db;
43 };
44
45 struct mlx5_frag_wq_ctrl {
46 struct mlx5_core_dev *mdev;
47 struct mlx5_frag_buf frag_buf;
48 struct mlx5_db db;
49 };
50
51 struct mlx5_wq_cyc {
52 void *buf;
53 __be32 *db;
54 u16 sz_m1;
55 u8 log_stride;
56 };
57
58 struct mlx5_wq_qp {
59 struct mlx5_wq_cyc rq;
60 struct mlx5_wq_cyc sq;
61 };
62
63 struct mlx5_cqwq {
64 void *buf;
65 __be32 *db;
66 u32 sz_m1;
67 u32 cc; /* consumer counter */
68 u8 log_sz;
69 u8 log_stride;
70 };
71
72 struct mlx5_wq_ll {
73 void *buf;
74 __be32 *db;
75 __be16 *tail_next;
76 u16 sz_m1;
77 u16 head;
78 u16 wqe_ctr;
79 u16 cur_sz;
80 u8 log_stride;
81 };
82
83 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
84 void *wqc, struct mlx5_wq_cyc *wq,
85 struct mlx5_wq_ctrl *wq_ctrl);
86 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
87
88 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
89 void *cqc, struct mlx5_cqwq *wq,
90 struct mlx5_wq_ctrl *wq_ctrl);
91 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
92
93 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
94 void *wqc, struct mlx5_wq_ll *wq,
95 struct mlx5_wq_ctrl *wq_ctrl);
96 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
97
98 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
99
mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc * wq,u16 ctr)100 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
101 {
102 return ctr & wq->sz_m1;
103 }
104
mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc * wq,u16 ix)105 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
106 {
107 return wq->buf + (ix << wq->log_stride);
108 }
109
mlx5_wq_cyc_cc_bigger(u16 cc1,u16 cc2)110 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
111 {
112 int equal = (cc1 == cc2);
113 int smaller = 0x8000 & (cc1 - cc2);
114
115 return !equal && !smaller;
116 }
117
mlx5_cqwq_get_ci(struct mlx5_cqwq * wq)118 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
119 {
120 return wq->cc & wq->sz_m1;
121 }
122
mlx5_cqwq_get_wqe(struct mlx5_cqwq * wq,u32 ix)123 static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
124 {
125 return wq->buf + (ix << wq->log_stride);
126 }
127
mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq * wq)128 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
129 {
130 return wq->cc >> wq->log_sz;
131 }
132
mlx5_cqwq_pop(struct mlx5_cqwq * wq)133 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
134 {
135 wq->cc++;
136 }
137
mlx5_cqwq_update_db_record(struct mlx5_cqwq * wq)138 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
139 {
140 *wq->db = cpu_to_be32(wq->cc & 0xffffff);
141 }
142
mlx5_wq_ll_is_full(struct mlx5_wq_ll * wq)143 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
144 {
145 return wq->cur_sz == wq->sz_m1;
146 }
147
mlx5_wq_ll_is_empty(struct mlx5_wq_ll * wq)148 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
149 {
150 return !wq->cur_sz;
151 }
152
mlx5_wq_ll_push(struct mlx5_wq_ll * wq,u16 head_next)153 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
154 {
155 wq->head = head_next;
156 wq->wqe_ctr++;
157 wq->cur_sz++;
158 }
159
mlx5_wq_ll_pop(struct mlx5_wq_ll * wq,__be16 ix,__be16 * next_tail_next)160 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
161 __be16 *next_tail_next)
162 {
163 *wq->tail_next = ix;
164 wq->tail_next = next_tail_next;
165 wq->cur_sz--;
166 }
mlx5_wq_ll_update_db_record(struct mlx5_wq_ll * wq)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
mlx5_wq_ll_get_wqe(struct mlx5_wq_ll * wq,u16 ix)172 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
173 {
174 return wq->buf + (ix << wq->log_stride);
175 }
176
177 #endif /* __MLX5_WQ_H__ */
178