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 #include <linux/mlx5/cq.h>
38 #include <linux/mlx5/qp.h>
39
40 struct mlx5_wq_param {
41 int buf_numa_node;
42 int db_numa_node;
43 };
44
45 struct mlx5_wq_ctrl {
46 struct mlx5_core_dev *mdev;
47 struct mlx5_frag_buf buf;
48 struct mlx5_db db;
49 };
50
51 struct mlx5_wq_cyc {
52 struct mlx5_frag_buf_ctrl fbc;
53 __be32 *db;
54 u16 sz;
55 u16 wqe_ctr;
56 u16 cur_sz;
57 };
58
59 struct mlx5_wq_qp {
60 struct mlx5_wq_cyc rq;
61 struct mlx5_wq_cyc sq;
62 };
63
64 struct mlx5_cqwq {
65 struct mlx5_frag_buf_ctrl fbc;
66 __be32 *db;
67 u32 cc; /* consumer counter */
68 };
69
70 struct mlx5_wq_ll {
71 struct mlx5_frag_buf_ctrl fbc;
72 __be32 *db;
73 __be16 *tail_next;
74 u16 head;
75 u16 wqe_ctr;
76 u16 cur_sz;
77 };
78
79 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
80 void *wqc, struct mlx5_wq_cyc *wq,
81 struct mlx5_wq_ctrl *wq_ctrl);
82 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
83
84 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
85 void *qpc, struct mlx5_wq_qp *wq,
86 struct mlx5_wq_ctrl *wq_ctrl);
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_is_full(struct mlx5_wq_cyc * wq)100 static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
101 {
102 return wq->cur_sz == wq->sz;
103 }
104
mlx5_wq_cyc_missing(struct mlx5_wq_cyc * wq)105 static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
106 {
107 return wq->sz - wq->cur_sz;
108 }
109
mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc * wq)110 static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
111 {
112 return !wq->cur_sz;
113 }
114
mlx5_wq_cyc_push(struct mlx5_wq_cyc * wq)115 static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
116 {
117 wq->wqe_ctr++;
118 wq->cur_sz++;
119 }
120
mlx5_wq_cyc_push_n(struct mlx5_wq_cyc * wq,u8 n)121 static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
122 {
123 wq->wqe_ctr += n;
124 wq->cur_sz += n;
125 }
126
mlx5_wq_cyc_pop(struct mlx5_wq_cyc * wq)127 static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
128 {
129 wq->cur_sz--;
130 }
131
mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc * wq)132 static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
133 {
134 *wq->db = cpu_to_be32(wq->wqe_ctr);
135 }
136
mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc * wq,u16 ctr)137 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
138 {
139 return ctr & wq->fbc.sz_m1;
140 }
141
mlx5_wq_cyc_get_head(struct mlx5_wq_cyc * wq)142 static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
143 {
144 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
145 }
146
mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc * wq)147 static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
148 {
149 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
150 }
151
mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc * wq,u16 ix)152 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
153 {
154 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
155 }
156
mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc * wq,u16 ix)157 static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix)
158 {
159 return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1;
160 }
161
mlx5_wq_cyc_cc_bigger(u16 cc1,u16 cc2)162 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
163 {
164 int equal = (cc1 == cc2);
165 int smaller = 0x8000 & (cc1 - cc2);
166
167 return !equal && !smaller;
168 }
169
mlx5_cqwq_ctr2ix(struct mlx5_cqwq * wq,u32 ctr)170 static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
171 {
172 return ctr & wq->fbc.sz_m1;
173 }
174
mlx5_cqwq_get_ci(struct mlx5_cqwq * wq)175 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
176 {
177 return mlx5_cqwq_ctr2ix(wq, wq->cc);
178 }
179
mlx5_cqwq_get_wqe(struct mlx5_cqwq * wq,u32 ix)180 static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
181 {
182 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
183 }
184
mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq * wq,u32 ctr)185 static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
186 {
187 return ctr >> wq->fbc.log_sz;
188 }
189
mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq * wq)190 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
191 {
192 return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
193 }
194
mlx5_cqwq_pop(struct mlx5_cqwq * wq)195 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
196 {
197 wq->cc++;
198 }
199
mlx5_cqwq_update_db_record(struct mlx5_cqwq * wq)200 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
201 {
202 *wq->db = cpu_to_be32(wq->cc & 0xffffff);
203 }
204
mlx5_cqwq_get_cqe(struct mlx5_cqwq * wq)205 static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq)
206 {
207 u32 ci = mlx5_cqwq_get_ci(wq);
208 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
209 u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
210 u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;
211
212 if (cqe_ownership_bit != sw_ownership_val)
213 return NULL;
214
215 /* ensure cqe content is read after cqe ownership bit */
216 dma_rmb();
217
218 return cqe;
219 }
220
mlx5_wq_ll_is_full(struct mlx5_wq_ll * wq)221 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
222 {
223 return wq->cur_sz == wq->fbc.sz_m1;
224 }
225
mlx5_wq_ll_is_empty(struct mlx5_wq_ll * wq)226 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
227 {
228 return !wq->cur_sz;
229 }
230
mlx5_wq_ll_missing(struct mlx5_wq_ll * wq)231 static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)
232 {
233 return wq->fbc.sz_m1 - wq->cur_sz;
234 }
235
mlx5_wq_ll_get_wqe(struct mlx5_wq_ll * wq,u16 ix)236 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
237 {
238 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
239 }
240
mlx5_wq_ll_push(struct mlx5_wq_ll * wq,u16 head_next)241 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
242 {
243 wq->head = head_next;
244 wq->wqe_ctr++;
245 wq->cur_sz++;
246 }
247
mlx5_wq_ll_pop(struct mlx5_wq_ll * wq,__be16 ix,__be16 * next_tail_next)248 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
249 __be16 *next_tail_next)
250 {
251 *wq->tail_next = ix;
252 wq->tail_next = next_tail_next;
253 wq->cur_sz--;
254 }
255
mlx5_wq_ll_update_db_record(struct mlx5_wq_ll * wq)256 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
257 {
258 *wq->db = cpu_to_be32(wq->wqe_ctr);
259 }
260
261 #endif /* __MLX5_WQ_H__ */
262