2 * Copyright (c) 2007, 2014 Mellanox Technologies. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/mlx4/cq.h>
35 #include <linux/mlx4/qp.h>
36 #include <linux/mlx4/cmd.h>
41 static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
47 int mlx4_en_create_cq(struct mlx4_en_priv *priv,
48 struct mlx4_en_cq **pcq,
49 int entries, int ring, enum cq_type mode,
52 struct mlx4_en_dev *mdev = priv->mdev;
53 struct mlx4_en_cq *cq;
56 cq = kzalloc_node(sizeof(struct mlx4_en_cq), GFP_KERNEL, node);
58 cq = kzalloc(sizeof(struct mlx4_en_cq), GFP_KERNEL);
60 en_err(priv, "Failed to allocate CW struture\n");
66 cq->buf_size = cq->size * mdev->dev->caps.cqe_size;
68 cq->tq = taskqueue_create_fast("mlx4_en_que", M_NOWAIT,
69 taskqueue_thread_enqueue, &cq->tq);
71 TASK_INIT(&cq->cq_task, 0, mlx4_en_rx_que, cq);
72 taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s rx cq",
76 TASK_INIT(&cq->cq_task, 0, mlx4_en_tx_que, cq);
77 taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s tx cq",
83 spin_lock_init(&cq->lock);
85 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
86 cq->buf_size, 2 * PAGE_SIZE);
90 err = mlx4_en_map_buffer(&cq->wqres.buf);
94 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
100 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
107 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
110 struct mlx4_en_dev *mdev = priv->mdev;
113 int timestamp_en = 0;
115 cq->dev = mdev->pndev[priv->port];
116 cq->mcq.set_ci_db = cq->wqres.db.db;
117 cq->mcq.arm_db = cq->wqres.db.db + 1;
118 *cq->mcq.set_ci_db = 0;
120 memset(cq->buf, 0, cq->buf_size);
122 if (cq->is_tx == RX) {
123 if (mdev->dev->caps.comp_pool) {
125 sprintf(name, "%s-%d", if_name(priv->dev),
127 /* Set IRQ for specific name (per ring) */
128 if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) {
129 cq->vector = (cq->ring + 1 + priv->port)
130 % mdev->dev->caps.num_comp_vectors;
131 mlx4_warn(mdev, "Failed Assigning an EQ to "
132 "%s ,Falling back to legacy EQ's\n",
137 cq->vector = (cq->ring + 1 + priv->port) %
138 mdev->dev->caps.num_comp_vectors;
141 struct mlx4_en_cq *rx_cq;
143 * For TX we use the same irq per
144 * ring we assigned for the RX
146 cq_idx = cq_idx % priv->rx_ring_num;
147 rx_cq = priv->rx_cq[cq_idx];
148 cq->vector = rx_cq->vector;
152 cq->size = priv->rx_ring[cq->ring]->actual_size;
153 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt,
154 &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq,
155 cq->vector, 0, timestamp_en);
159 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
160 cq->mcq.event = mlx4_en_cq_event;
163 init_timer(&cq->timer);
164 cq->timer.function = mlx4_en_poll_tx_cq;
165 cq->timer.data = (unsigned long) cq;
172 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
174 struct mlx4_en_dev *mdev = priv->mdev;
175 struct mlx4_en_cq *cq = *pcq;
177 taskqueue_drain(cq->tq, &cq->cq_task);
178 taskqueue_free(cq->tq);
179 mlx4_en_unmap_buffer(&cq->wqres.buf);
180 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
181 if (priv->mdev->dev->caps.comp_pool && cq->vector)
182 mlx4_release_eq(priv->mdev->dev, cq->vector);
187 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
189 struct mlx4_en_dev *mdev = priv->mdev;
191 taskqueue_drain(cq->tq, &cq->cq_task);
193 del_timer(&cq->timer);
195 mlx4_cq_free(mdev->dev, &cq->mcq);
199 /* Set rx cq moderation parameters */
200 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
202 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
203 cq->moder_cnt, cq->moder_time);
206 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
208 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
209 &priv->mdev->uar_lock);