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