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/*
* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/mlx4/cq.h>
#include <linux/mlx4/qp.h>
#include <linux/mlx4/cmd.h>
#include "mlx4_en.h"
static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
{
return;
}
int mlx4_en_create_cq(struct mlx4_en_priv *priv,
struct mlx4_en_cq *cq,
int entries, int ring, enum cq_type mode)
{
struct mlx4_en_dev *mdev = priv->mdev;
int err;
cq->size = entries;
if (mode == RX)
cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
else
cq->buf_size = sizeof(struct mlx4_cqe);
cq->ring = ring;
cq->is_tx = mode;
spin_lock_init(&cq->lock);
err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
cq->buf_size, 2 * PAGE_SIZE);
if (err)
return err;
err = mlx4_en_map_buffer(&cq->wqres.buf);
if (err)
mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
else
cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf;
return err;
}
int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
{
struct mlx4_en_dev *mdev = priv->mdev;
int err = 0;
char name[25];
cq->dev = mdev->pndev[priv->port];
cq->mcq.set_ci_db = cq->wqres.db.db;
cq->mcq.arm_db = cq->wqres.db.db + 1;
*cq->mcq.set_ci_db = 0;
*cq->mcq.arm_db = 0;
memset(cq->buf, 0, cq->buf_size);
if (cq->is_tx == RX) {
if (mdev->dev->caps.comp_pool) {
if (!cq->vector) {
sprintf(name , "%s-rx-%d", priv->dev->name, cq->ring);
if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) {
cq->vector = (cq->ring + 1 + priv->port) %
mdev->dev->caps.num_comp_vectors;
mlx4_warn(mdev, "Failed Assigning an EQ to "
"%s_rx-%d ,Falling back to legacy EQ's\n",
priv->dev->name, cq->ring);
}
}
} else {
cq->vector = (cq->ring + 1 + priv->port) %
mdev->dev->caps.num_comp_vectors;
}
} else {
if (!cq->vector || !mdev->dev->caps.comp_pool) {
/*Fallback to legacy pool in case of error*/
cq->vector = 0;
}
}
if (!cq->is_tx)
cq->size = priv->rx_ring[cq->ring].actual_size;
err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx);
if (err)
return err;
cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
cq->mcq.event = mlx4_en_cq_event;
if (cq->is_tx) {
init_timer(&cq->timer);
cq->timer.function = mlx4_en_poll_tx_cq;
cq->timer.data = (unsigned long) cq;
} else {
netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
napi_enable(&cq->napi);
}
return 0;
}
void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
bool reserve_vectors)
{
struct mlx4_en_dev *mdev = priv->mdev;
mlx4_en_unmap_buffer(&cq->wqres.buf);
mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
if (priv->mdev->dev->caps.comp_pool && cq->vector && !reserve_vectors)
mlx4_release_eq(priv->mdev->dev, cq->vector);
cq->buf_size = 0;
cq->buf = NULL;
}
void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
{
struct mlx4_en_dev *mdev = priv->mdev;
if (cq->is_tx)
del_timer(&cq->timer);
else {
napi_disable(&cq->napi);
netif_napi_del(&cq->napi);
}
mlx4_cq_free(mdev->dev, &cq->mcq);
}
/* Set rx cq moderation parameters */
int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
{
return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
cq->moder_cnt, cq->moder_time);
}
int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
{
mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
&priv->mdev->uar_lock);
return 0;
}
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