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 cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
55
56 cq->ring = ring;
57 cq->is_tx = mode;
58
59 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
60 cq->buf_size, 2 * PAGE_SIZE);
61 if (err)
62 return err;
63
64 err = mlx4_en_map_buffer(&cq->wqres.buf);
65 if (err)
66 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
67 else
68 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
69
70 return err;
71 }
72
mlx4_en_activate_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq,int cq_idx)73 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
74 int cq_idx)
75 {
76 struct mlx4_en_dev *mdev = priv->mdev;
77 int err = 0;
78 char name[25];
79
80 cq->dev = mdev->pndev[priv->port];
81 cq->mcq.set_ci_db = cq->wqres.db.db;
82 cq->mcq.arm_db = cq->wqres.db.db + 1;
83 *cq->mcq.set_ci_db = 0;
84 *cq->mcq.arm_db = 0;
85 memset(cq->buf, 0, cq->buf_size);
86
87 if (cq->is_tx == RX) {
88 if (mdev->dev->caps.comp_pool) {
89 if (!cq->vector) {
90 sprintf(name, "%s-%d", priv->dev->name,
91 cq->ring);
92 /* Set IRQ for specific name (per ring) */
93 if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) {
94 cq->vector = (cq->ring + 1 + priv->port)
95 % mdev->dev->caps.num_comp_vectors;
96 mlx4_warn(mdev, "Failed Assigning an EQ to "
97 "%s ,Falling back to legacy EQ's\n",
98 name);
99 }
100 }
101 } else {
102 cq->vector = (cq->ring + 1 + priv->port) %
103 mdev->dev->caps.num_comp_vectors;
104 }
105 } else {
106 /* For TX we use the same irq per
107 ring we assigned for the RX */
108 struct mlx4_en_cq *rx_cq;
109
110 cq_idx = cq_idx % priv->rx_ring_num;
111 rx_cq = &priv->rx_cq[cq_idx];
112 cq->vector = rx_cq->vector;
113 }
114
115 if (!cq->is_tx)
116 cq->size = priv->rx_ring[cq->ring].actual_size;
117
118 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
119 cq->wqres.db.dma, &cq->mcq, cq->vector, 0);
120 if (err)
121 return err;
122
123 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
124 cq->mcq.event = mlx4_en_cq_event;
125
126 if (cq->is_tx) {
127 init_timer(&cq->timer);
128 cq->timer.function = mlx4_en_poll_tx_cq;
129 cq->timer.data = (unsigned long) cq;
130 } else {
131 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
132 napi_enable(&cq->napi);
133 }
134
135 return 0;
136 }
137
mlx4_en_destroy_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)138 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
139 {
140 struct mlx4_en_dev *mdev = priv->mdev;
141
142 mlx4_en_unmap_buffer(&cq->wqres.buf);
143 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
144 if (priv->mdev->dev->caps.comp_pool && cq->vector)
145 mlx4_release_eq(priv->mdev->dev, cq->vector);
146 cq->vector = 0;
147 cq->buf_size = 0;
148 cq->buf = NULL;
149 }
150
mlx4_en_deactivate_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)151 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
152 {
153 struct mlx4_en_dev *mdev = priv->mdev;
154
155 if (cq->is_tx)
156 del_timer(&cq->timer);
157 else {
158 napi_disable(&cq->napi);
159 netif_napi_del(&cq->napi);
160 }
161
162 mlx4_cq_free(mdev->dev, &cq->mcq);
163 }
164
165 /* Set rx cq moderation parameters */
mlx4_en_set_cq_moder(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)166 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
167 {
168 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
169 cq->moder_cnt, cq->moder_time);
170 }
171
mlx4_en_arm_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)172 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
173 {
174 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
175 &priv->mdev->uar_lock);
176
177 return 0;
178 }
179
180
181