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 <linux/mlx4/cq.h>
35 #include <linux/mlx4/qp.h>
36 #include <linux/mlx4/cmd.h>
37
38 #include "mlx4_en.h"
39
mlx4_en_cq_event(struct mlx4_cq * cq,enum mlx4_event event)40 static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
41 {
42 return;
43 }
44
45
mlx4_en_create_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq,int entries,int ring,enum cq_type mode)46 int 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 if (mode == RX) {
55 cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
56 cq->vector = ring % mdev->dev->caps.num_comp_vectors;
57 } else {
58 cq->buf_size = sizeof(struct mlx4_cqe);
59 cq->vector = 0;
60 }
61
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);
74 else
75 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
76
77 return err;
78 }
79
mlx4_en_activate_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)80 int 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;
90 memset(cq->buf, 0, cq->buf_size);
91
92 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
93 cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
94 if (err)
95 return err;
96
97 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
98 cq->mcq.event = mlx4_en_cq_event;
99
100 if (cq->is_tx) {
101 init_timer(&cq->timer);
102 cq->timer.function = mlx4_en_poll_tx_cq;
103 cq->timer.data = (unsigned long) cq;
104 } else {
105 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
106 napi_enable(&cq->napi);
107 }
108
109 return 0;
110 }
111
mlx4_en_destroy_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)112 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
113 {
114 struct mlx4_en_dev *mdev = priv->mdev;
115
116 mlx4_en_unmap_buffer(&cq->wqres.buf);
117 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
118 cq->buf_size = 0;
119 cq->buf = NULL;
120 }
121
mlx4_en_deactivate_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)122 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
123 {
124 struct mlx4_en_dev *mdev = priv->mdev;
125
126 if (cq->is_tx)
127 del_timer(&cq->timer);
128 else
129 napi_disable(&cq->napi);
130
131 mlx4_cq_free(mdev->dev, &cq->mcq);
132 }
133
134 /* Set rx cq moderation parameters */
mlx4_en_set_cq_moder(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)135 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
136 {
137 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
138 cq->moder_cnt, cq->moder_time);
139 }
140
mlx4_en_arm_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)141 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
142 {
143 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
144 &priv->mdev->uar_lock);
145
146 return 0;
147 }
148
149
150