tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
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 if (mode == RX)
55 cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
56 else
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);
71 else
72 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
73
74 return err;
75}
76
77int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
78{
79 struct mlx4_en_dev *mdev = priv->mdev;
80 int err = 0;
81 char name[25];
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;
88 memset(cq->buf, 0, cq->buf_size);
89
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
113 if (!cq->is_tx)
114 cq->size = priv->rx_ring[cq->ring].actual_size;
115
116 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
117 cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
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
136void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
137 bool reserve_vectors)
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);
143 if (priv->mdev->dev->caps.comp_pool && cq->vector && !reserve_vectors)
144 mlx4_release_eq(priv->mdev->dev, cq->vector);
145 cq->buf_size = 0;
146 cq->buf = NULL;
147}
148
149void 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);
155 else {
156 napi_disable(&cq->napi);
157 netif_napi_del(&cq->napi);
158 }
159
160 mlx4_cq_free(mdev->dev, &cq->mcq);
161}
162
163/* Set rx cq moderation parameters */
164int 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
170int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
171{
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