LXR linux/drivers/net/mlx4/en

   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                cq->vector   = ring % mdev->dev->caps.num_comp_vectors;
  57        } else {
  58                cq->buf_size = sizeof(struct mlx4_cqe);
  59                cq->vector   = 0;
  60        }
  61
  62        cq->ring = ring;
  63        cq->is_tx = mode;
  64        spin_lock_init(&cq->lock);
  65
  66        err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
  67                                cq->buf_size, 2 * PAGE_SIZE);
  68        if (err)
  69                return err;
  70
  71        err = mlx4_en_map_buffer(&cq->wqres.buf);
  72        if (err)
  73                mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
  74        else
  75                cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
  76
  77        return err;
  78}
  79
  80int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
  81{
  82        struct mlx4_en_dev *mdev = priv->mdev;
  83        int err;
  84
  85        cq->dev = mdev->pndev[priv->port];
  86        cq->mcq.set_ci_db  = cq->wqres.db.db;
  87        cq->mcq.arm_db     = cq->wqres.db.db + 1;
  88        *cq->mcq.set_ci_db = 0;
  89        *cq->mcq.arm_db    = 0;
  90        memset(cq->buf, 0, cq->buf_size);
  91
  92        if (!cq->is_tx)
  93                cq->size = priv->rx_ring[cq->ring].actual_size;
  94
  95        err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
  96                            cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
  97        if (err)
  98                return err;
  99
 100        cq->mcq.comp  = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
 101        cq->mcq.event = mlx4_en_cq_event;
 102
 103        if (cq->is_tx) {
 104                init_timer(&cq->timer);
 105                cq->timer.function = mlx4_en_poll_tx_cq;
 106                cq->timer.data = (unsigned long) cq;
 107        } else {
 108                netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
 109                napi_enable(&cq->napi);
 110        }
 111
 112        return 0;
 113}
 114
 115void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 116{
 117        struct mlx4_en_dev *mdev = priv->mdev;
 118
 119        mlx4_en_unmap_buffer(&cq->wqres.buf);
 120        mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
 121        cq->buf_size = 0;
 122        cq->buf = NULL;
 123}
 124
 125void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 126{
 127        struct mlx4_en_dev *mdev = priv->mdev;
 128
 129        if (cq->is_tx)
 130                del_timer(&cq->timer);
 131        else {
 132                napi_disable(&cq->napi);
 133                netif_napi_del(&cq->napi);
 134        }
 135
 136        mlx4_cq_free(mdev->dev, &cq->mcq);
 137}
 138
 139/* Set rx cq moderation parameters */
 140int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 141{
 142        return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
 143                              cq->moder_cnt, cq->moder_time);
 144}
 145
 146int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 147{
 148        mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
 149                    &priv->mdev->uar_lock);
 150
 151        return 0;
 152}
 153
 154
 155