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 ** pcq,int entries,int ring,enum cq_type mode,int node)46 int 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(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(&mdev->dev->persist->pdev->dev, node);
72 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
73 cq->buf_size);
74 set_dev_node(&mdev->dev->persist->pdev->dev, 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
83 err_cq:
84 kfree(cq);
85 *pcq = NULL;
86 return err;
87 }
88
mlx4_en_activate_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq,int cq_idx)89 int 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 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(mdev->dev, priv->port,
106 cq->vector)) {
107 cq->vector = cpumask_first(priv->rx_ring[cq->ring]->affinity_mask);
108
109 err = mlx4_assign_eq(mdev->dev, priv->port,
110 &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
120 cq->irq_desc =
121 irq_to_desc(mlx4_eq_get_irq(mdev->dev,
122 cq->vector));
123 } else {
124 /* For TX we use the same irq per
125 ring we assigned for the RX */
126 struct mlx4_en_cq *rx_cq;
127
128 cq_idx = cq_idx % priv->rx_ring_num;
129 rx_cq = priv->rx_cq[cq_idx];
130 cq->vector = rx_cq->vector;
131 }
132
133 if (cq->type == RX)
134 cq->size = priv->rx_ring[cq->ring]->actual_size;
135
136 if ((cq->type != RX && priv->hwtstamp_config.tx_type) ||
137 (cq->type == RX && priv->hwtstamp_config.rx_filter))
138 timestamp_en = 1;
139
140 cq->mcq.usage = MLX4_RES_USAGE_DRIVER;
141 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt,
142 &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq,
143 cq->vector, 0, timestamp_en, &cq->wqres.buf, false);
144 if (err)
145 goto free_eq;
146
147 cq->mcq.event = mlx4_en_cq_event;
148
149 switch (cq->type) {
150 case TX:
151 cq->mcq.comp = mlx4_en_tx_irq;
152 netif_tx_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq,
153 NAPI_POLL_WEIGHT);
154 napi_enable(&cq->napi);
155 break;
156 case RX:
157 cq->mcq.comp = mlx4_en_rx_irq;
158 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
159 napi_enable(&cq->napi);
160 break;
161 case TX_XDP:
162 /* nothing regarding napi, it's shared with rx ring */
163 cq->xdp_busy = false;
164 break;
165 }
166
167 return 0;
168
169 free_eq:
170 if (assigned_eq)
171 mlx4_release_eq(mdev->dev, cq->vector);
172 cq->vector = mdev->dev->caps.num_comp_vectors;
173 return err;
174 }
175
mlx4_en_destroy_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq ** pcq)176 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
177 {
178 struct mlx4_en_dev *mdev = priv->mdev;
179 struct mlx4_en_cq *cq = *pcq;
180
181 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
182 if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) &&
183 cq->type == RX)
184 mlx4_release_eq(priv->mdev->dev, cq->vector);
185 cq->vector = 0;
186 cq->buf_size = 0;
187 cq->buf = NULL;
188 kfree(cq);
189 *pcq = NULL;
190 }
191
mlx4_en_deactivate_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)192 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
193 {
194 if (cq->type != TX_XDP) {
195 napi_disable(&cq->napi);
196 netif_napi_del(&cq->napi);
197 }
198
199 mlx4_cq_free(priv->mdev->dev, &cq->mcq);
200 }
201
202 /* Set rx cq moderation parameters */
mlx4_en_set_cq_moder(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)203 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
204 {
205 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
206 cq->moder_cnt, cq->moder_time);
207 }
208
mlx4_en_arm_cq(struct mlx4_en_priv * priv,struct mlx4_en_cq * cq)209 void mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
210 {
211 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
212 &priv->mdev->uar_lock);
213 }
214
215
216