1/*
2 * Copyright (c) 2007 Mellanox Technologies. 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
34#include "mlx4_en.h"
35
36#include <linux/mlx4/cq.h>
37#include <linux/mlx4/qp.h>
38#include <linux/mlx4/cmd.h>
39
40static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
41{
42	return;
43}
44
45
46int mlx4_en_create_cq(struct mlx4_en_priv *priv,
47		      struct mlx4_en_cq *cq,
48		      int entries, int ring, enum cq_type mode)
49{
50	struct mlx4_en_dev *mdev = priv->mdev;
51	int err;
52
53	cq->size = entries;
54	cq->tq = taskqueue_create_fast("mlx4_en_que", M_NOWAIT,
55	    taskqueue_thread_enqueue, &cq->tq);
56	if (mode == RX) {
57		cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
58		cq->vector   = (ring + priv->port) %
59				mdev->dev->caps.num_comp_vectors;
60		TASK_INIT(&cq->cq_task, 0, mlx4_en_rx_que, cq);
61		taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s rx cq",
62		    if_name(priv->dev));
63	} else {
64		cq->buf_size = sizeof(struct mlx4_cqe);
65		cq->vector   = MLX4_LEAST_ATTACHED_VECTOR;
66		TASK_INIT(&cq->cq_task, 0, mlx4_en_tx_que, cq);
67		taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s tx cq",
68		    if_name(priv->dev));
69	}
70
71	cq->ring = ring;
72	cq->is_tx = mode;
73	mtx_init(&cq->lock.m, "mlx4 cq", NULL, MTX_DEF);
74
75	err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
76				cq->buf_size, 2 * PAGE_SIZE);
77	if (err)
78		return err;
79
80	err = mlx4_en_map_buffer(&cq->wqres.buf);
81	if (err)
82		mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
83	else
84		cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
85
86	return err;
87}
88
89int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
90{
91	struct mlx4_en_dev *mdev = priv->mdev;
92	int err;
93
94	cq->dev = mdev->pndev[priv->port];
95	cq->mcq.set_ci_db  = cq->wqres.db.db;
96	cq->mcq.arm_db     = cq->wqres.db.db + 1;
97	*cq->mcq.set_ci_db = 0;
98	*cq->mcq.arm_db    = 0;
99	memset(cq->buf, 0, cq->buf_size);
100
101	if (!cq->is_tx)
102		cq->size = priv->rx_ring[cq->ring].actual_size;
103
104
105	err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
106			    cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx, 0);
107	if (err) {
108		return err;
109        }
110
111	cq->mcq.comp  = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
112	cq->mcq.event = mlx4_en_cq_event;
113
114	if (cq->is_tx) {
115		init_timer(&cq->timer);
116		cq->timer.function = mlx4_en_poll_tx_cq;
117		cq->timer.data = (unsigned long) cq;
118	}
119
120	return 0;
121}
122
123void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
124{
125	struct mlx4_en_dev *mdev = priv->mdev;
126
127	taskqueue_drain(cq->tq, &cq->cq_task);
128	taskqueue_free(cq->tq);
129	mlx4_en_unmap_buffer(&cq->wqres.buf);
130	mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
131	cq->buf_size = 0;
132	cq->buf = NULL;
133	mtx_destroy(&cq->lock.m);
134}
135
136void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
137{
138	struct mlx4_en_dev *mdev = priv->mdev;
139
140	taskqueue_drain(cq->tq, &cq->cq_task);
141	if (cq->is_tx)
142		del_timer(&cq->timer);
143
144	mlx4_cq_free(mdev->dev, &cq->mcq);
145}
146
147/* Set rx cq moderation parameters */
148int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
149{
150	return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
151			      cq->moder_cnt, cq->moder_time);
152}
153
154int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
155{
156	mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
157		    &priv->mdev->uar_lock);
158
159	return 0;
160}
161
162
163