/*
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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 **pcq,
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int entries, int ring, enum cq_type mode,
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int node)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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struct mlx4_en_cq *cq;
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int err;
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cq = kzalloc_node(sizeof(*cq), GFP_KERNEL, node);
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if (!cq) {
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en_err(priv, "Failed to allocate CQ structure\n");
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return -ENOMEM;
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}
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cq->size = entries;
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cq->buf_size = cq->size * mdev->dev->caps.cqe_size;
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cq->ring = ring;
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cq->type = mode;
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cq->vector = mdev->dev->caps.num_comp_vectors;
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/* Allocate HW buffers on provided NUMA node.
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* dev->numa_node is used in mtt range allocation flow.
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*/
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set_dev_node(&mdev->dev->persist->pdev->dev, node);
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err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
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cq->buf_size);
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set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node);
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if (err)
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goto err_cq;
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cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf;
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*pcq = cq;
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return 0;
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err_cq:
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kfree(cq);
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*pcq = NULL;
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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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int cq_idx)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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int err = 0;
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int timestamp_en = 0;
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bool assigned_eq = false;
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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->type == RX) {
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if (!mlx4_is_eq_vector_valid(mdev->dev, priv->port,
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cq->vector)) {
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cq->vector = cpumask_first(priv->rx_ring[cq->ring]->affinity_mask);
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err = mlx4_assign_eq(mdev->dev, priv->port,
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&cq->vector);
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if (err) {
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mlx4_err(mdev, "Failed assigning an EQ to CQ vector %d\n",
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cq->vector);
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goto free_eq;
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}
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assigned_eq = true;
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}
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cq->irq_desc =
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irq_to_desc(mlx4_eq_get_irq(mdev->dev,
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cq->vector));
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} else {
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/* For TX we use the same irq per
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ring we assigned for the RX */
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struct mlx4_en_cq *rx_cq;
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cq_idx = cq_idx % priv->rx_ring_num;
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rx_cq = priv->rx_cq[cq_idx];
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cq->vector = rx_cq->vector;
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}
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if (cq->type == RX)
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cq->size = priv->rx_ring[cq->ring]->actual_size;
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if ((cq->type != RX && priv->hwtstamp_config.tx_type) ||
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(cq->type == RX && priv->hwtstamp_config.rx_filter))
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timestamp_en = 1;
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cq->mcq.usage = MLX4_RES_USAGE_DRIVER;
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err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt,
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&mdev->priv_uar, cq->wqres.db.dma, &cq->mcq,
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cq->vector, 0, timestamp_en, &cq->wqres.buf, false);
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if (err)
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goto free_eq;
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cq->mcq.event = mlx4_en_cq_event;
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switch (cq->type) {
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case TX:
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cq->mcq.comp = mlx4_en_tx_irq;
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netif_tx_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq,
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NAPI_POLL_WEIGHT);
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napi_enable(&cq->napi);
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break;
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case RX:
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cq->mcq.comp = mlx4_en_rx_irq;
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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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break;
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case TX_XDP:
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/* nothing regarding napi, it's shared with rx ring */
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cq->xdp_busy = false;
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break;
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}
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return 0;
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free_eq:
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if (assigned_eq)
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mlx4_release_eq(mdev->dev, cq->vector);
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cq->vector = mdev->dev->caps.num_comp_vectors;
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return err;
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}
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void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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struct mlx4_en_cq *cq = *pcq;
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mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
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if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) &&
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cq->type == RX)
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mlx4_release_eq(priv->mdev->dev, cq->vector);
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cq->vector = 0;
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cq->buf_size = 0;
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cq->buf = NULL;
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kfree(cq);
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*pcq = 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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if (cq->type != TX_XDP) {
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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(priv->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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void 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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}
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