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c27a02cd YP |
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 | ||
40 | static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event) | |
41 | { | |
42 | return; | |
43 | } | |
44 | ||
45 | ||
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; | |
1fb9876e | 54 | if (mode == RX) |
c27a02cd | 55 | cq->buf_size = cq->size * sizeof(struct mlx4_cqe); |
1fb9876e | 56 | else |
c27a02cd YP |
57 | cq->buf_size = sizeof(struct mlx4_cqe); |
58 | ||
59 | cq->ring = ring; | |
60 | cq->is_tx = mode; | |
61 | spin_lock_init(&cq->lock); | |
62 | ||
63 | err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, | |
64 | cq->buf_size, 2 * PAGE_SIZE); | |
65 | if (err) | |
66 | return err; | |
67 | ||
68 | err = mlx4_en_map_buffer(&cq->wqres.buf); | |
69 | if (err) | |
70 | mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); | |
b51968d6 YP |
71 | else |
72 | cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf; | |
c27a02cd YP |
73 | |
74 | return err; | |
75 | } | |
76 | ||
77 | int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) | |
78 | { | |
79 | struct mlx4_en_dev *mdev = priv->mdev; | |
1fb9876e YP |
80 | int err = 0; |
81 | char name[25]; | |
c27a02cd YP |
82 | |
83 | cq->dev = mdev->pndev[priv->port]; | |
84 | cq->mcq.set_ci_db = cq->wqres.db.db; | |
85 | cq->mcq.arm_db = cq->wqres.db.db + 1; | |
86 | *cq->mcq.set_ci_db = 0; | |
87 | *cq->mcq.arm_db = 0; | |
c27a02cd YP |
88 | memset(cq->buf, 0, cq->buf_size); |
89 | ||
1fb9876e YP |
90 | if (cq->is_tx == RX) { |
91 | if (mdev->dev->caps.comp_pool) { | |
92 | if (!cq->vector) { | |
93 | sprintf(name , "%s-rx-%d", priv->dev->name, cq->ring); | |
94 | if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) { | |
95 | cq->vector = (cq->ring + 1 + priv->port) % | |
96 | mdev->dev->caps.num_comp_vectors; | |
97 | mlx4_warn(mdev, "Failed Assigning an EQ to " | |
98 | "%s_rx-%d ,Falling back to legacy EQ's\n", | |
99 | priv->dev->name, cq->ring); | |
100 | } | |
101 | } | |
102 | } else { | |
103 | cq->vector = (cq->ring + 1 + priv->port) % | |
104 | mdev->dev->caps.num_comp_vectors; | |
105 | } | |
106 | } else { | |
107 | if (!cq->vector || !mdev->dev->caps.comp_pool) { | |
108 | /*Fallback to legacy pool in case of error*/ | |
109 | cq->vector = 0; | |
110 | } | |
111 | } | |
112 | ||
38aab07c YP |
113 | if (!cq->is_tx) |
114 | cq->size = priv->rx_ring[cq->ring].actual_size; | |
115 | ||
c27a02cd | 116 | err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar, |
b8dd786f | 117 | cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx); |
c27a02cd YP |
118 | if (err) |
119 | return err; | |
120 | ||
121 | cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq; | |
122 | cq->mcq.event = mlx4_en_cq_event; | |
123 | ||
124 | if (cq->is_tx) { | |
125 | init_timer(&cq->timer); | |
126 | cq->timer.function = mlx4_en_poll_tx_cq; | |
127 | cq->timer.data = (unsigned long) cq; | |
128 | } else { | |
129 | netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); | |
130 | napi_enable(&cq->napi); | |
131 | } | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
1fb9876e YP |
136 | void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, |
137 | bool reserve_vectors) | |
c27a02cd YP |
138 | { |
139 | struct mlx4_en_dev *mdev = priv->mdev; | |
140 | ||
141 | mlx4_en_unmap_buffer(&cq->wqres.buf); | |
142 | mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); | |
1fb9876e YP |
143 | if (priv->mdev->dev->caps.comp_pool && cq->vector && !reserve_vectors) |
144 | mlx4_release_eq(priv->mdev->dev, cq->vector); | |
c27a02cd YP |
145 | cq->buf_size = 0; |
146 | cq->buf = NULL; | |
147 | } | |
148 | ||
149 | void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) | |
150 | { | |
151 | struct mlx4_en_dev *mdev = priv->mdev; | |
152 | ||
153 | if (cq->is_tx) | |
154 | del_timer(&cq->timer); | |
72876a60 | 155 | else { |
c27a02cd | 156 | napi_disable(&cq->napi); |
72876a60 YP |
157 | netif_napi_del(&cq->napi); |
158 | } | |
c27a02cd YP |
159 | |
160 | mlx4_cq_free(mdev->dev, &cq->mcq); | |
161 | } | |
162 | ||
163 | /* Set rx cq moderation parameters */ | |
164 | int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) | |
165 | { | |
166 | return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, | |
167 | cq->moder_cnt, cq->moder_time); | |
168 | } | |
169 | ||
170 | int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) | |
171 | { | |
c27a02cd YP |
172 | mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, |
173 | &priv->mdev->uar_lock); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 |