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 **pcq,
48 int entries, int ring, enum cq_type mode,
49 int node)
50{
51 struct mlx4_en_dev *mdev = priv->mdev;
52 struct mlx4_en_cq *cq;
53 int err;
54
55 cq = kzalloc_node(size: sizeof(*cq), GFP_KERNEL, node);
56 if (!cq) {
57 en_err(priv, "Failed to allocate CQ structure\n");
58 return -ENOMEM;
59 }
60
61 cq->size = entries;
62 cq->buf_size = cq->size * mdev->dev->caps.cqe_size;
63
64 cq->ring = ring;
65 cq->type = mode;
66 cq->vector = mdev->dev->caps.num_comp_vectors;
67
68 /* Allocate HW buffers on provided NUMA node.
69 * dev->numa_node is used in mtt range allocation flow.
70 */
71 set_dev_node(dev: &mdev->dev->persist->pdev->dev, node);
72 err = mlx4_alloc_hwq_res(dev: mdev->dev, wqres: &cq->wqres,
73 size: cq->buf_size);
74 set_dev_node(dev: &mdev->dev->persist->pdev->dev, node: mdev->dev->numa_node);
75 if (err)
76 goto err_cq;
77
78 cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf;
79 *pcq = cq;
80
81 return 0;
82
83err_cq:
84 kfree(objp: cq);
85 *pcq = NULL;
86 return err;
87}
88
89int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
90 int cq_idx)
91{
92 struct mlx4_en_dev *mdev = priv->mdev;
93 int irq, err = 0;
94 int timestamp_en = 0;
95 bool assigned_eq = false;
96
97 cq->dev = mdev->pndev[priv->port];
98 cq->mcq.set_ci_db = cq->wqres.db.db;
99 cq->mcq.arm_db = cq->wqres.db.db + 1;
100 *cq->mcq.set_ci_db = 0;
101 *cq->mcq.arm_db = 0;
102 memset(cq->buf, 0, cq->buf_size);
103
104 if (cq->type == RX) {
105 if (!mlx4_is_eq_vector_valid(dev: mdev->dev, port: priv->port,
106 vector: cq->vector)) {
107 cq->vector = cpumask_first(srcp: priv->rx_ring[cq->ring]->affinity_mask);
108
109 err = mlx4_assign_eq(dev: mdev->dev, port: priv->port,
110 vector: &cq->vector);
111 if (err) {
112 mlx4_err(mdev, "Failed assigning an EQ to CQ vector %d\n",
113 cq->vector);
114 goto free_eq;
115 }
116
117 assigned_eq = true;
118 }
119 irq = mlx4_eq_get_irq(dev: mdev->dev, vec: cq->vector);
120 cq->aff_mask = irq_get_effective_affinity_mask(irq);
121 } else {
122 /* For TX we use the same irq per
123 ring we assigned for the RX */
124 struct mlx4_en_cq *rx_cq;
125
126 cq_idx = cq_idx % priv->rx_ring_num;
127 rx_cq = priv->rx_cq[cq_idx];
128 cq->vector = rx_cq->vector;
129 }
130
131 if (cq->type == RX)
132 cq->size = priv->rx_ring[cq->ring]->actual_size;
133
134 if ((cq->type != RX && priv->hwtstamp_config.tx_type) ||
135 (cq->type == RX && priv->hwtstamp_config.rx_filter))
136 timestamp_en = 1;
137
138 cq->mcq.usage = MLX4_RES_USAGE_DRIVER;
139 err = mlx4_cq_alloc(dev: mdev->dev, nent: cq->size, mtt: &cq->wqres.mtt,
140 uar: &mdev->priv_uar, db_rec: cq->wqres.db.dma, cq: &cq->mcq,
141 vector: cq->vector, collapsed: 0, timestamp_en, buf_addr: &cq->wqres.buf, user_cq: false);
142 if (err)
143 goto free_eq;
144
145 cq->mcq.event = mlx4_en_cq_event;
146
147 switch (cq->type) {
148 case TX:
149 cq->mcq.comp = mlx4_en_tx_irq;
150 netif_napi_add_tx(dev: cq->dev, napi: &cq->napi, poll: mlx4_en_poll_tx_cq);
151 napi_enable(n: &cq->napi);
152 break;
153 case RX:
154 cq->mcq.comp = mlx4_en_rx_irq;
155 netif_napi_add(dev: cq->dev, napi: &cq->napi, poll: mlx4_en_poll_rx_cq);
156 napi_enable(n: &cq->napi);
157 break;
158 case TX_XDP:
159 /* nothing regarding napi, it's shared with rx ring */
160 cq->xdp_busy = false;
161 break;
162 }
163
164 return 0;
165
166free_eq:
167 if (assigned_eq)
168 mlx4_release_eq(dev: mdev->dev, vec: cq->vector);
169 cq->vector = mdev->dev->caps.num_comp_vectors;
170 return err;
171}
172
173void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
174{
175 struct mlx4_en_dev *mdev = priv->mdev;
176 struct mlx4_en_cq *cq = *pcq;
177
178 mlx4_free_hwq_res(mdev: mdev->dev, wqres: &cq->wqres, size: cq->buf_size);
179 if (mlx4_is_eq_vector_valid(dev: mdev->dev, port: priv->port, vector: cq->vector) &&
180 cq->type == RX)
181 mlx4_release_eq(dev: priv->mdev->dev, vec: cq->vector);
182 cq->vector = 0;
183 cq->buf_size = 0;
184 cq->buf = NULL;
185 kfree(objp: cq);
186 *pcq = NULL;
187}
188
189void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
190{
191 if (cq->type != TX_XDP) {
192 napi_disable(n: &cq->napi);
193 netif_napi_del(napi: &cq->napi);
194 }
195
196 mlx4_cq_free(dev: priv->mdev->dev, cq: &cq->mcq);
197}
198
199/* Set rx cq moderation parameters */
200int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
201{
202 return mlx4_cq_modify(dev: priv->mdev->dev, cq: &cq->mcq,
203 count: cq->moder_cnt, period: cq->moder_time);
204}
205
206void mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
207{
208 mlx4_cq_arm(cq: &cq->mcq, cmd: MLX4_CQ_DB_REQ_NOT, uar_page: priv->mdev->uar_map,
209 doorbell_lock: &priv->mdev->uar_lock);
210}
211
212
213

source code of linux/drivers/net/ethernet/mellanox/mlx4/en_cq.c