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Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -07001/*
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 <linux/mlx4/cq.h>
35#include <linux/mlx4/qp.h>
36#include <linux/mlx4/cmd.h>
37
38#include "mlx4_en.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;
Yevgeny Petrilinb8dd7862008-12-22 07:15:03 -080054 if (mode == RX) {
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070055 cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
Yevgeny Petrilinb8dd7862008-12-22 07:15:03 -080056 cq->vector = ring % mdev->dev->caps.num_comp_vectors;
57 } else {
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070058 cq->buf_size = sizeof(struct mlx4_cqe);
Yevgeny Petrilinb8dd7862008-12-22 07:15:03 -080059 cq->vector = 0;
60 }
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070061
62 cq->ring = ring;
63 cq->is_tx = mode;
64 spin_lock_init(&cq->lock);
65
66 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
67 cq->buf_size, 2 * PAGE_SIZE);
68 if (err)
69 return err;
70
71 err = mlx4_en_map_buffer(&cq->wqres.buf);
72 if (err)
73 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
Yevgeny Petrilinb51968d2008-12-25 18:13:20 -080074 else
75 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070076
77 return err;
78}
79
80int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
81{
82 struct mlx4_en_dev *mdev = priv->mdev;
83 int err;
84
85 cq->dev = mdev->pndev[priv->port];
86 cq->mcq.set_ci_db = cq->wqres.db.db;
87 cq->mcq.arm_db = cq->wqres.db.db + 1;
88 *cq->mcq.set_ci_db = 0;
89 *cq->mcq.arm_db = 0;
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070090 memset(cq->buf, 0, cq->buf_size);
91
Yevgeny Petrilin38aab072009-05-24 03:17:11 +000092 if (!cq->is_tx)
93 cq->size = priv->rx_ring[cq->ring].actual_size;
94
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070095 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
Yevgeny Petrilinb8dd7862008-12-22 07:15:03 -080096 cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -070097 if (err)
98 return err;
99
100 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
101 cq->mcq.event = mlx4_en_cq_event;
102
103 if (cq->is_tx) {
104 init_timer(&cq->timer);
105 cq->timer.function = mlx4_en_poll_tx_cq;
106 cq->timer.data = (unsigned long) cq;
107 } else {
108 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
109 napi_enable(&cq->napi);
110 }
111
112 return 0;
113}
114
115void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
116{
117 struct mlx4_en_dev *mdev = priv->mdev;
118
119 mlx4_en_unmap_buffer(&cq->wqres.buf);
120 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
121 cq->buf_size = 0;
122 cq->buf = NULL;
123}
124
125void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
126{
127 struct mlx4_en_dev *mdev = priv->mdev;
128
129 if (cq->is_tx)
130 del_timer(&cq->timer);
Yevgeny Petrilin72876a62009-05-17 20:48:59 -0700131 else {
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -0700132 napi_disable(&cq->napi);
Yevgeny Petrilin72876a62009-05-17 20:48:59 -0700133 netif_napi_del(&cq->napi);
134 }
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -0700135
136 mlx4_cq_free(mdev->dev, &cq->mcq);
137}
138
139/* Set rx cq moderation parameters */
140int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
141{
142 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
143 cq->moder_cnt, cq->moder_time);
144}
145
146int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
147{
Yevgeny Petrilinc27a02c2008-10-22 15:47:49 -0700148 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
149 &priv->mdev->uar_lock);
150
151 return 0;
152}
153
154