[deliverable/linux.git] / drivers / net / ethernet / mellanox / mlx5 / core / wq.c

/*
 * Copyright (c) 2013-2015, Mellanox Technologies, Ltd.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/mlx5/driver.h>
#include "wq.h"
#include "mlx5_core.h"

u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
{
	return (u32)wq->sz_m1 + 1;
}

u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
{
	return wq->sz_m1 + 1;
}

u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
{
	return (u32)wq->sz_m1 + 1;
}

static u32 mlx5_wq_cyc_get_byte_size(struct mlx5_wq_cyc *wq)
{
	return mlx5_wq_cyc_get_size(wq) << wq->log_stride;
}

static u32 mlx5_cqwq_get_byte_size(struct mlx5_cqwq *wq)
{
	return mlx5_cqwq_get_size(wq) << wq->log_stride;
}

static u32 mlx5_wq_ll_get_byte_size(struct mlx5_wq_ll *wq)
{
	return mlx5_wq_ll_get_size(wq) << wq->log_stride;
}

int 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)
{
	int err;

	wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
	wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;

	err = mlx5_db_alloc(mdev, &wq_ctrl->db);
	if (err) {
		mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
		return err;
	}

	err = mlx5_buf_alloc(mdev, mlx5_wq_cyc_get_byte_size(wq), &wq_ctrl->buf);
	if (err) {
		mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
		goto err_db_free;
	}

	wq->buf = wq_ctrl->buf.direct.buf;
	wq->db  = wq_ctrl->db.db;

	wq_ctrl->mdev = mdev;

	return 0;

err_db_free:
	mlx5_db_free(mdev, &wq_ctrl->db);

	return err;
}

int 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)
{
	int err;

	wq->log_stride = 6 + MLX5_GET(cqc, cqc, cqe_sz);
	wq->log_sz = MLX5_GET(cqc, cqc, log_cq_size);
	wq->sz_m1 = (1 << wq->log_sz) - 1;

	err = mlx5_db_alloc(mdev, &wq_ctrl->db);
	if (err) {
		mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
		return err;
	}

	err = mlx5_buf_alloc(mdev, mlx5_cqwq_get_byte_size(wq), &wq_ctrl->buf);
	if (err) {
		mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
		goto err_db_free;
	}

	wq->buf = wq_ctrl->buf.direct.buf;
	wq->db  = wq_ctrl->db.db;

	wq_ctrl->mdev = mdev;

	return 0;

err_db_free:
	mlx5_db_free(mdev, &wq_ctrl->db);

	return err;
}

int 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)
{
	struct mlx5_wqe_srq_next_seg *next_seg;
	int err;
	int i;

	wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
	wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;

	err = mlx5_db_alloc(mdev, &wq_ctrl->db);
	if (err) {
		mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
		return err;
	}

	err = mlx5_buf_alloc(mdev, mlx5_wq_ll_get_byte_size(wq), &wq_ctrl->buf);
	if (err) {
		mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
		goto err_db_free;
	}

	wq->buf = wq_ctrl->buf.direct.buf;
	wq->db  = wq_ctrl->db.db;

	for (i = 0; i < wq->sz_m1; i++) {
		next_seg = mlx5_wq_ll_get_wqe(wq, i);
		next_seg->next_wqe_index = cpu_to_be16(i + 1);
	}
	next_seg = mlx5_wq_ll_get_wqe(wq, i);
	wq->tail_next = &next_seg->next_wqe_index;

	wq_ctrl->mdev = mdev;

	return 0;

err_db_free:
	mlx5_db_free(mdev, &wq_ctrl->db);

	return err;
}

void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
{
	mlx5_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
	mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
}
Commit	Line	Data
e586b3b0 AV	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
	37	u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
	38	{
	39	return (u32)wq->sz_m1 + 1;
	40	}
	41
	42	u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
	43	{
	44	return wq->sz_m1 + 1;
	45	}
	46
	47	u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
	48	{
	49	return (u32)wq->sz_m1 + 1;
	50	}
	51
	52	static 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
	57	static u32 mlx5_cqwq_get_byte_size(struct mlx5_cqwq *wq)
	58	{
	59	return mlx5_cqwq_get_size(wq) << wq->log_stride;
	60	}
	61
	62	static 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
67	int 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(mdev, &wq_ctrl->db);
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(mdev, mlx5_wq_cyc_get_byte_size(wq), &wq_ctrl->buf);
83	if (err) {
84	mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
85	goto err_db_free;
86	}
87
88	wq->buf = wq_ctrl->buf.direct.buf;
89	wq->db = wq_ctrl->db.db;
90
91	wq_ctrl->mdev = mdev;
92
93	return 0;
94
95	err_db_free:
96	mlx5_db_free(mdev, &wq_ctrl->db);
97
98	return err;
99	}
100
101	int mlx5_cqwq_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
102	void cqc, struct mlx5_cqwq wq,
103	struct mlx5_wq_ctrl *wq_ctrl)
104	{
105	int err;
106
107	wq->log_stride = 6 + MLX5_GET(cqc, cqc, cqe_sz);
108	wq->log_sz = MLX5_GET(cqc, cqc, log_cq_size);
109	wq->sz_m1 = (1 << wq->log_sz) - 1;
110
111	err = mlx5_db_alloc(mdev, &wq_ctrl->db);
112	if (err) {
113	mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
114	return err;
115	}
116
117	err = mlx5_buf_alloc(mdev, mlx5_cqwq_get_byte_size(wq), &wq_ctrl->buf);
118	if (err) {
119	mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
120	goto err_db_free;
121	}
122
123	wq->buf = wq_ctrl->buf.direct.buf;
124	wq->db = wq_ctrl->db.db;
125
126	wq_ctrl->mdev = mdev;
127
128	return 0;
129
130	err_db_free:
131	mlx5_db_free(mdev, &wq_ctrl->db);
132
133	return err;
134	}
135
136	int mlx5_wq_ll_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
137	void wqc, struct mlx5_wq_ll wq,
138	struct mlx5_wq_ctrl *wq_ctrl)
139	{
140	struct mlx5_wqe_srq_next_seg *next_seg;
141	int err;
142	int i;
143
144	wq->log_stride = MLX5_GET(wq, wqc, log_wq_stride);
145	wq->sz_m1 = (1 << MLX5_GET(wq, wqc, log_wq_sz)) - 1;
146
147	err = mlx5_db_alloc(mdev, &wq_ctrl->db);
148	if (err) {
149	mlx5_core_warn(mdev, "mlx5_db_alloc() failed, %d\n", err);
150	return err;
151	}
152
153	err = mlx5_buf_alloc(mdev, mlx5_wq_ll_get_byte_size(wq), &wq_ctrl->buf);
154	if (err) {
155	mlx5_core_warn(mdev, "mlx5_buf_alloc() failed, %d\n", err);
156	goto err_db_free;
157	}
158
159	wq->buf = wq_ctrl->buf.direct.buf;
160	wq->db = wq_ctrl->db.db;
161
162	for (i = 0; i < wq->sz_m1; i++) {
163	next_seg = mlx5_wq_ll_get_wqe(wq, i);
164	next_seg->next_wqe_index = cpu_to_be16(i + 1);
165	}
166	next_seg = mlx5_wq_ll_get_wqe(wq, i);
167	wq->tail_next = &next_seg->next_wqe_index;
168
169	wq_ctrl->mdev = mdev;
170
171	return 0;
172
173	err_db_free:
174	mlx5_db_free(mdev, &wq_ctrl->db);
175
176	return err;
177	}
178
179	void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
180	{
181	mlx5_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
182	mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
183	}