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 #include <linux/mlx5/driver.h>
34 #include "wq.h"
35 #include "mlx5_core.h"
36
wq_get_byte_sz(u8 log_sz,u8 log_stride)37 static u32 wq_get_byte_sz(u8 log_sz, u8 log_stride)
38 {
39 return ((u32)1 << log_sz) << log_stride;
40 }
41
mlx5_wq_cyc_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * wqc,struct mlx5_wq_cyc * wq,struct mlx5_wq_ctrl * wq_ctrl)42 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
43 void *wqc, struct mlx5_wq_cyc *wq,
44 struct mlx5_wq_ctrl *wq_ctrl)
45 {
46 u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
47 u8 log_wq_sz = MLX5_GET(wq, wqc, log_wq_sz);
48 struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
49 int err;
50
51 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
52 if (err) {
53 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
54 return err;
55 }
56
57 wq->db = wq_ctrl->db.db;
58
59 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
60 &wq_ctrl->buf, param->buf_numa_node);
61 if (err) {
62 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
63 goto err_db_free;
64 }
65
66 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
67 wq->sz = mlx5_wq_cyc_get_size(wq);
68
69 wq_ctrl->mdev = mdev;
70
71 return 0;
72
73 err_db_free:
74 mlx5_db_free(mdev, &wq_ctrl->db);
75
76 return err;
77 }
78
mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc * wq,u16 ix,u8 nstrides)79 void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides)
80 {
81 size_t len;
82 void *wqe;
83
84 if (!net_ratelimit())
85 return;
86
87 nstrides = max_t(u8, nstrides, 1);
88
89 len = nstrides << wq->fbc.log_stride;
90 wqe = mlx5_wq_cyc_get_wqe(wq, ix);
91
92 pr_info("WQE DUMP: WQ size %d WQ cur size %d, WQE index 0x%x, len: %zu\n",
93 mlx5_wq_cyc_get_size(wq), wq->cur_sz, ix, len);
94 print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 1, wqe, len, false);
95 }
96
mlx5_wq_cyc_reset(struct mlx5_wq_cyc * wq)97 void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq)
98 {
99 wq->wqe_ctr = 0;
100 wq->cur_sz = 0;
101 mlx5_wq_cyc_update_db_record(wq);
102 }
103
mlx5_wq_qp_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * qpc,struct mlx5_wq_qp * wq,struct mlx5_wq_ctrl * wq_ctrl)104 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
105 void *qpc, struct mlx5_wq_qp *wq,
106 struct mlx5_wq_ctrl *wq_ctrl)
107 {
108 u8 log_rq_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4;
109 u8 log_rq_sz = MLX5_GET(qpc, qpc, log_rq_size);
110 u8 log_sq_stride = ilog2(MLX5_SEND_WQE_BB);
111 u8 log_sq_sz = MLX5_GET(qpc, qpc, log_sq_size);
112
113 u32 rq_byte_size;
114 int err;
115
116
117
118 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
119 if (err) {
120 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
121 return err;
122 }
123
124 err = mlx5_frag_buf_alloc_node(mdev,
125 wq_get_byte_sz(log_rq_sz, log_rq_stride) +
126 wq_get_byte_sz(log_sq_sz, log_sq_stride),
127 &wq_ctrl->buf, param->buf_numa_node);
128 if (err) {
129 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
130 goto err_db_free;
131 }
132
133 mlx5_init_fbc(wq_ctrl->buf.frags, log_rq_stride, log_rq_sz, &wq->rq.fbc);
134
135 rq_byte_size = wq_get_byte_sz(log_rq_sz, log_rq_stride);
136
137 if (rq_byte_size < PAGE_SIZE) {
138 /* SQ starts within the same page of the RQ */
139 u16 sq_strides_offset = rq_byte_size / MLX5_SEND_WQE_BB;
140
141 mlx5_init_fbc_offset(wq_ctrl->buf.frags,
142 log_sq_stride, log_sq_sz, sq_strides_offset,
143 &wq->sq.fbc);
144 } else {
145 u16 rq_npages = rq_byte_size >> PAGE_SHIFT;
146
147 mlx5_init_fbc(wq_ctrl->buf.frags + rq_npages,
148 log_sq_stride, log_sq_sz, &wq->sq.fbc);
149 }
150
151 wq->rq.db = &wq_ctrl->db.db[MLX5_RCV_DBR];
152 wq->sq.db = &wq_ctrl->db.db[MLX5_SND_DBR];
153
154 wq_ctrl->mdev = mdev;
155
156 return 0;
157
158 err_db_free:
159 mlx5_db_free(mdev, &wq_ctrl->db);
160
161 return err;
162 }
163
mlx5_cqwq_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * cqc,struct mlx5_cqwq * wq,struct mlx5_wq_ctrl * wq_ctrl)164 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
165 void *cqc, struct mlx5_cqwq *wq,
166 struct mlx5_wq_ctrl *wq_ctrl)
167 {
168 /* CQE_STRIDE_128 and CQE_STRIDE_128_PAD both mean 128B stride */
169 u8 log_wq_stride = MLX5_GET(cqc, cqc, cqe_sz) == CQE_STRIDE_64 ? 6 : 7;
170 u8 log_wq_sz = MLX5_GET(cqc, cqc, log_cq_size);
171 int err;
172
173 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
174 if (err) {
175 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
176 return err;
177 }
178
179 wq->db = wq_ctrl->db.db;
180
181 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
182 &wq_ctrl->buf,
183 param->buf_numa_node);
184 if (err) {
185 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n",
186 err);
187 goto err_db_free;
188 }
189
190 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, &wq->fbc);
191
192 wq_ctrl->mdev = mdev;
193
194 return 0;
195
196 err_db_free:
197 mlx5_db_free(mdev, &wq_ctrl->db);
198
199 return err;
200 }
201
mlx5_wq_ll_init_list(struct mlx5_wq_ll * wq)202 static void mlx5_wq_ll_init_list(struct mlx5_wq_ll *wq)
203 {
204 struct mlx5_wqe_srq_next_seg *next_seg;
205 int i;
206
207 for (i = 0; i < wq->fbc.sz_m1; i++) {
208 next_seg = mlx5_wq_ll_get_wqe(wq, i);
209 next_seg->next_wqe_index = cpu_to_be16(i + 1);
210 }
211 next_seg = mlx5_wq_ll_get_wqe(wq, i);
212 wq->tail_next = &next_seg->next_wqe_index;
213 }
214
mlx5_wq_ll_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * wqc,struct mlx5_wq_ll * wq,struct mlx5_wq_ctrl * wq_ctrl)215 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
216 void *wqc, struct mlx5_wq_ll *wq,
217 struct mlx5_wq_ctrl *wq_ctrl)
218 {
219 u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
220 u8 log_wq_sz = MLX5_GET(wq, wqc, log_wq_sz);
221 struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
222 int err;
223
224 err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
225 if (err) {
226 mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
227 return err;
228 }
229
230 wq->db = wq_ctrl->db.db;
231
232 err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
233 &wq_ctrl->buf, param->buf_numa_node);
234 if (err) {
235 mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
236 goto err_db_free;
237 }
238
239 mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
240
241 mlx5_wq_ll_init_list(wq);
242 wq_ctrl->mdev = mdev;
243
244 return 0;
245
246 err_db_free:
247 mlx5_db_free(mdev, &wq_ctrl->db);
248
249 return err;
250 }
251
mlx5_wq_ll_reset(struct mlx5_wq_ll * wq)252 void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq)
253 {
254 wq->head = 0;
255 wq->wqe_ctr = 0;
256 wq->cur_sz = 0;
257 mlx5_wq_ll_init_list(wq);
258 mlx5_wq_ll_update_db_record(wq);
259 }
260
mlx5_wq_destroy(struct mlx5_wq_ctrl * wq_ctrl)261 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
262 {
263 mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
264 mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
265 }
266
267