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
37u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
38{
39	return (u32)wq->sz_m1 + 1;
40}
41
42u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
43{
44	return wq->sz_m1 + 1;
45}
46
47u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
48{
49	return (u32)wq->sz_m1 + 1;
50}
51
52static u32 mlx5_wq_cyc_get_byte_size(struct mlx5_wq_cyc *wq)
53{
54	return mlx5_wq_cyc_get_size(wq) << wq->log_stride;
55}
56
57static u32 mlx5_cqwq_get_byte_size(struct mlx5_cqwq *wq)
58{
59	return mlx5_cqwq_get_size(wq) << wq->log_stride;
60}
61
62static u32 mlx5_wq_ll_get_byte_size(struct mlx5_wq_ll *wq)
63{
64	return mlx5_wq_ll_get_size(wq) << wq->log_stride;
65}
66
67int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
68		       void *wqc, struct mlx5_wq_cyc *wq,
69		       struct mlx5_wq_ctrl *wq_ctrl)
70{
71	int err;
72
73	wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
74	wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
75
76	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
77	if (err) {
78		mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
79		return err;
80	}
81
82	err = mlx5_buf_alloc_node(mdev, mlx5_wq_cyc_get_byte_size(wq),
83				  &wq_ctrl->buf, param->buf_numa_node);
84	if (err) {
85		mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
86		goto err_db_free;
87	}
88
89	wq->buf = wq_ctrl->buf.direct.buf;
90	wq->db  = wq_ctrl->db.db;
91
92	wq_ctrl->mdev = mdev;
93
94	return 0;
95
96err_db_free:
97	mlx5_db_free(mdev, &wq_ctrl->db);
98
99	return err;
100}
101
102int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
103		     void *cqc, struct mlx5_cqwq *wq,
104		     struct mlx5_wq_ctrl *wq_ctrl)
105{
106	int err;
107
108	wq->log_stride = 6 + MLX5_GET(cqc, cqc, cqe_sz);
109	wq->log_sz = MLX5_GET(cqc, cqc, log_cq_size);
110	wq->sz_m1 = (1 << wq->log_sz) - 1;
111
112	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
113	if (err) {
114		mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
115		return err;
116	}
117
118	err = mlx5_buf_alloc_node(mdev, mlx5_cqwq_get_byte_size(wq),
119				  &wq_ctrl->buf, param->buf_numa_node);
120	if (err) {
121		mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
122		goto err_db_free;
123	}
124
125	wq->buf = wq_ctrl->buf.direct.buf;
126	wq->db  = wq_ctrl->db.db;
127
128	wq_ctrl->mdev = mdev;
129
130	return 0;
131
132err_db_free:
133	mlx5_db_free(mdev, &wq_ctrl->db);
134
135	return err;
136}
137
138int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
139		      void *wqc, struct mlx5_wq_ll *wq,
140		      struct mlx5_wq_ctrl *wq_ctrl)
141{
142	struct mlx5_wqe_srq_next_seg *next_seg;
143	int err;
144	int i;
145
146	wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
147	wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
148
149	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
150	if (err) {
151		mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
152		return err;
153	}
154
155	err = mlx5_buf_alloc(mdev, mlx5_wq_ll_get_byte_size(wq), &wq_ctrl->buf);
156	if (err) {
157		mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
158		goto err_db_free;
159	}
160
161	wq->buf = wq_ctrl->buf.direct.buf;
162	wq->db  = wq_ctrl->db.db;
163
164	for (i = 0; i < wq->sz_m1; i++) {
165		next_seg = mlx5_wq_ll_get_wqe(wq, i);
166		next_seg->next_wqe_index = cpu_to_be16(i + 1);
167	}
168	next_seg = mlx5_wq_ll_get_wqe(wq, i);
169	wq->tail_next = &next_seg->next_wqe_index;
170
171	wq_ctrl->mdev = mdev;
172
173	return 0;
174
175err_db_free:
176	mlx5_db_free(mdev, &wq_ctrl->db);
177
178	return err;
179}
180
181void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
182{
183	mlx5_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
184	mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
185}
186