drivers/net/mlx4/en_cq.c

   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
  40 static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
  41 {
  42         return;
  43 }
  44
  45
  46 int 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
  80 int 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         err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
  93                             cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
  94         if (err)
  95                 return err;
  96
  97         cq->mcq.comp  = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
  98         cq->mcq.event = mlx4_en_cq_event;
  99
 100         if (cq->is_tx) {
 101                 init_timer(&cq->timer);
 102                 cq->timer.function = mlx4_en_poll_tx_cq;
 103                 cq->timer.data = (unsigned long) cq;
 104         } else {
 105                 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
 106                 napi_enable(&cq->napi);
 107         }
 108
 109         return 0;
 110 }
 111
 112 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 113 {
 114         struct mlx4_en_dev *mdev = priv->mdev;
 115
 116         mlx4_en_unmap_buffer(&cq->wqres.buf);
 117         mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
 118         cq->buf_size = 0;
 119         cq->buf = NULL;
 120 }
 121
 122 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 123 {
 124         struct mlx4_en_dev *mdev = priv->mdev;
 125
 126         if (cq->is_tx)
 127                 del_timer(&cq->timer);
 128         else {
 129                 napi_disable(&cq->napi);
 130                 netif_napi_del(&cq->napi);
 131         }
 132
 133         mlx4_cq_free(mdev->dev, &cq->mcq);
 134 }
 135
 136 /* Set rx cq moderation parameters */
 137 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 138 {
 139         return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
 140                               cq->moder_cnt, cq->moder_time);
 141 }
 142
 143 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 144 {
 145         mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
 146                     &priv->mdev->uar_lock);
 147
 148         return 0;
 149 }
 150
 151