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	cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
55
56	cq->ring = ring;
57	cq->is_tx = mode;
58	spin_lock_init(&cq->lock);
59
60	err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
61				cq->buf_size, 2 * PAGE_SIZE);
62	if (err)
63		return err;
64
65	err = mlx4_en_map_buffer(&cq->wqres.buf);
66	if (err)
67		mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
68	else
69		cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
70
71	return err;
72}
73
74int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
75			int cq_idx)
76{
77	struct mlx4_en_dev *mdev = priv->mdev;
78	int err = 0;
79	char name[25];
80
81	cq->dev = mdev->pndev[priv->port];
82	cq->mcq.set_ci_db  = cq->wqres.db.db;
83	cq->mcq.arm_db     = cq->wqres.db.db + 1;
84	*cq->mcq.set_ci_db = 0;
85	*cq->mcq.arm_db    = 0;
86	memset(cq->buf, 0, cq->buf_size);
87
88	if (cq->is_tx == RX) {
89		if (mdev->dev->caps.comp_pool) {
90			if (!cq->vector) {
91				sprintf(name, "%s-%d", priv->dev->name,
92					cq->ring);
93				/* Set IRQ for specific name (per 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 ,Falling back to legacy EQ's\n",
99						  name);
100				}
101			}
102		} else {
103			cq->vector = (cq->ring + 1 + priv->port) %
104				mdev->dev->caps.num_comp_vectors;
105		}
106	} else {
107		/* For TX we use the same irq per
108		ring we assigned for the RX    */
109		struct mlx4_en_cq *rx_cq;
110
111		cq_idx = cq_idx % priv->rx_ring_num;
112		rx_cq = &priv->rx_cq[cq_idx];
113		cq->vector = rx_cq->vector;
114	}
115
116	if (!cq->is_tx)
117		cq->size = priv->rx_ring[cq->ring].actual_size;
118
119	err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
120			    cq->wqres.db.dma, &cq->mcq, cq->vector, 0);
121	if (err)
122		return err;
123
124	cq->mcq.comp  = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
125	cq->mcq.event = mlx4_en_cq_event;
126
127	if (cq->is_tx) {
128		init_timer(&cq->timer);
129		cq->timer.function = mlx4_en_poll_tx_cq;
130		cq->timer.data = (unsigned long) cq;
131	} else {
132		netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
133		napi_enable(&cq->napi);
134	}
135
136	return 0;
137}
138
139void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
140{
141	struct mlx4_en_dev *mdev = priv->mdev;
142
143	mlx4_en_unmap_buffer(&cq->wqres.buf);
144	mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
145	if (priv->mdev->dev->caps.comp_pool && cq->vector)
146		mlx4_release_eq(priv->mdev->dev, cq->vector);
147	cq->vector = 0;
148	cq->buf_size = 0;
149	cq->buf = NULL;
150}
151
152void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
153{
154	struct mlx4_en_dev *mdev = priv->mdev;
155
156	if (cq->is_tx)
157		del_timer(&cq->timer);
158	else {
159		napi_disable(&cq->napi);
160		netif_napi_del(&cq->napi);
161	}
162
163	mlx4_cq_free(mdev->dev, &cq->mcq);
164}
165
166/* Set rx cq moderation parameters */
167int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
168{
169	return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
170			      cq->moder_cnt, cq->moder_time);
171}
172
173int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
174{
175	mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
176		    &priv->mdev->uar_lock);
177
178	return 0;
179}
180
181
182