155 lines
4.1 KiB
C
155 lines
4.1 KiB
C
/*
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* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/mlx4/cq.h>
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#include <linux/mlx4/qp.h>
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#include <linux/mlx4/cmd.h>
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#include "mlx4_en.h"
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static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
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{
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return;
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}
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int mlx4_en_create_cq(struct mlx4_en_priv *priv,
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struct mlx4_en_cq *cq,
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int entries, int ring, enum cq_type mode)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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int err;
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cq->size = entries;
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if (mode == RX) {
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cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
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cq->vector = ring % mdev->dev->caps.num_comp_vectors;
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} else {
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cq->buf_size = sizeof(struct mlx4_cqe);
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cq->vector = 0;
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}
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cq->ring = ring;
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cq->is_tx = mode;
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spin_lock_init(&cq->lock);
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err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
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cq->buf_size, 2 * PAGE_SIZE);
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if (err)
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return err;
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err = mlx4_en_map_buffer(&cq->wqres.buf);
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if (err)
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mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
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else
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cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
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return err;
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}
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int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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int err;
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cq->dev = mdev->pndev[priv->port];
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cq->mcq.set_ci_db = cq->wqres.db.db;
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cq->mcq.arm_db = cq->wqres.db.db + 1;
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*cq->mcq.set_ci_db = 0;
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*cq->mcq.arm_db = 0;
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memset(cq->buf, 0, cq->buf_size);
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if (!cq->is_tx)
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cq->size = priv->rx_ring[cq->ring].actual_size;
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err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
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cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
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if (err)
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return err;
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cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
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cq->mcq.event = mlx4_en_cq_event;
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if (cq->is_tx) {
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init_timer(&cq->timer);
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cq->timer.function = mlx4_en_poll_tx_cq;
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cq->timer.data = (unsigned long) cq;
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} else {
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netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
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napi_enable(&cq->napi);
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}
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return 0;
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}
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void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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mlx4_en_unmap_buffer(&cq->wqres.buf);
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mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
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cq->buf_size = 0;
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cq->buf = NULL;
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}
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void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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if (cq->is_tx)
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del_timer(&cq->timer);
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else {
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napi_disable(&cq->napi);
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netif_napi_del(&cq->napi);
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}
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mlx4_cq_free(mdev->dev, &cq->mcq);
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}
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/* Set rx cq moderation parameters */
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int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
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{
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return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
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cq->moder_cnt, cq->moder_time);
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}
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int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
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{
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mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
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&priv->mdev->uar_lock);
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return 0;
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}
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