1 /*-
2 * Copyright (c) 2013-2015, 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: stable/10/sys/dev/mlx5/mlx5_core/wq.h 290650 2015-11-10 12:20:22Z hselasky $
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_wq_cyc {
46 void *buf;
47 __be32 *db;
48 u16 sz_m1;
49 u8 log_stride;
50 };
51
52 struct mlx5_cqwq {
53 void *buf;
54 __be32 *db;
55 u32 sz_m1;
56 u32 cc; /* consumer counter */
57 u8 log_sz;
58 u8 log_stride;
59 };
60
61 struct mlx5_wq_ll {
62 void *buf;
63 __be32 *db;
64 __be16 *tail_next;
65 u16 sz_m1;
66 u16 head;
67 u16 wqe_ctr;
68 u16 cur_sz;
69 u8 log_stride;
70 };
71
72 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
73 void *wqc, struct mlx5_wq_cyc *wq,
74 struct mlx5_wq_ctrl *wq_ctrl);
75 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
76
77 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
78 void *cqc, struct mlx5_cqwq *wq,
79 struct mlx5_wq_ctrl *wq_ctrl);
80 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
81
82 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
83 void *wqc, struct mlx5_wq_ll *wq,
84 struct mlx5_wq_ctrl *wq_ctrl);
85 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
86
87 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
88
mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc * wq,u16 ctr)89 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
90 {
91 return ctr & wq->sz_m1;
92 }
93
mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc * wq,u16 ix)94 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
95 {
96 return wq->buf + (ix << wq->log_stride);
97 }
98
mlx5_wq_cyc_cc_bigger(u16 cc1,u16 cc2)99 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
100 {
101 int equal = (cc1 == cc2);
102 int smaller = 0x8000 & (cc1 - cc2);
103
104 return !equal && !smaller;
105 }
106
mlx5_cqwq_get_ci(struct mlx5_cqwq * wq)107 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
108 {
109 return wq->cc & wq->sz_m1;
110 }
111
mlx5_cqwq_get_wqe(struct mlx5_cqwq * wq,u32 ix)112 static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
113 {
114 return wq->buf + (ix << wq->log_stride);
115 }
116
mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq * wq)117 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
118 {
119 return wq->cc >> wq->log_sz;
120 }
121
mlx5_cqwq_pop(struct mlx5_cqwq * wq)122 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
123 {
124 wq->cc++;
125 }
126
mlx5_cqwq_update_db_record(struct mlx5_cqwq * wq)127 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
128 {
129 *wq->db = cpu_to_be32(wq->cc & 0xffffff);
130 }
131
mlx5_wq_ll_is_full(struct mlx5_wq_ll * wq)132 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
133 {
134 return wq->cur_sz == wq->sz_m1;
135 }
136
mlx5_wq_ll_is_empty(struct mlx5_wq_ll * wq)137 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
138 {
139 return !wq->cur_sz;
140 }
141
mlx5_wq_ll_push(struct mlx5_wq_ll * wq,u16 head_next)142 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
143 {
144 wq->head = head_next;
145 wq->wqe_ctr++;
146 wq->cur_sz++;
147 }
148
mlx5_wq_ll_pop(struct mlx5_wq_ll * wq,__be16 ix,__be16 * next_tail_next)149 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
150 __be16 *next_tail_next)
151 {
152 *wq->tail_next = ix;
153 wq->tail_next = next_tail_next;
154 wq->cur_sz--;
155 }
mlx5_wq_ll_update_db_record(struct mlx5_wq_ll * wq)156 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
157 {
158 *wq->db = cpu_to_be32(wq->wqe_ctr);
159 }
160
mlx5_wq_ll_get_wqe(struct mlx5_wq_ll * wq,u16 ix)161 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
162 {
163 return wq->buf + (ix << wq->log_stride);
164 }
165
166 #endif /* __MLX5_WQ_H__ */
167