| /* |
| * 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 **pcq, |
| int entries, int ring, enum cq_type mode, |
| int node) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_en_cq *cq; |
| int err; |
| |
| cq = kzalloc_node(sizeof(*cq), GFP_KERNEL, node); |
| if (!cq) { |
| en_err(priv, "Failed to allocate CQ structure\n"); |
| return -ENOMEM; |
| } |
| |
| cq->size = entries; |
| cq->buf_size = cq->size * mdev->dev->caps.cqe_size; |
| |
| cq->ring = ring; |
| cq->type = mode; |
| cq->vector = mdev->dev->caps.num_comp_vectors; |
| |
| /* Allocate HW buffers on provided NUMA node. |
| * dev->numa_node is used in mtt range allocation flow. |
| */ |
| set_dev_node(&mdev->dev->persist->pdev->dev, node); |
| err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, |
| cq->buf_size); |
| set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node); |
| if (err) |
| goto err_cq; |
| |
| cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf; |
| *pcq = cq; |
| |
| return 0; |
| |
| err_cq: |
| kfree(cq); |
| *pcq = NULL; |
| return err; |
| } |
| |
| int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, |
| int cq_idx) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| int err = 0; |
| int timestamp_en = 0; |
| bool assigned_eq = false; |
| |
| 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->type == RX) { |
| if (!mlx4_is_eq_vector_valid(mdev->dev, priv->port, |
| cq->vector)) { |
| cq->vector = cpumask_first(priv->rx_ring[cq->ring]->affinity_mask); |
| |
| err = mlx4_assign_eq(mdev->dev, priv->port, |
| &cq->vector); |
| if (err) { |
| mlx4_err(mdev, "Failed assigning an EQ to CQ vector %d\n", |
| cq->vector); |
| goto free_eq; |
| } |
| |
| assigned_eq = true; |
| } |
| |
| cq->irq_desc = |
| irq_to_desc(mlx4_eq_get_irq(mdev->dev, |
| cq->vector)); |
| } else { |
| /* For TX we use the same irq per |
| ring we assigned for the RX */ |
| struct mlx4_en_cq *rx_cq; |
| |
| cq_idx = cq_idx % priv->rx_ring_num; |
| rx_cq = priv->rx_cq[cq_idx]; |
| cq->vector = rx_cq->vector; |
| } |
| |
| if (cq->type == RX) |
| cq->size = priv->rx_ring[cq->ring]->actual_size; |
| |
| if ((cq->type != RX && priv->hwtstamp_config.tx_type) || |
| (cq->type == RX && priv->hwtstamp_config.rx_filter)) |
| timestamp_en = 1; |
| |
| cq->mcq.usage = MLX4_RES_USAGE_DRIVER; |
| err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, |
| &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq, |
| cq->vector, 0, timestamp_en, &cq->wqres.buf, false); |
| if (err) |
| goto free_eq; |
| |
| cq->mcq.event = mlx4_en_cq_event; |
| |
| switch (cq->type) { |
| case TX: |
| cq->mcq.comp = mlx4_en_tx_irq; |
| netif_tx_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq, |
| NAPI_POLL_WEIGHT); |
| napi_enable(&cq->napi); |
| break; |
| case RX: |
| cq->mcq.comp = mlx4_en_rx_irq; |
| netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); |
| napi_enable(&cq->napi); |
| break; |
| case TX_XDP: |
| /* nothing regarding napi, it's shared with rx ring */ |
| cq->xdp_busy = false; |
| break; |
| } |
| |
| return 0; |
| |
| free_eq: |
| if (assigned_eq) |
| mlx4_release_eq(mdev->dev, cq->vector); |
| cq->vector = mdev->dev->caps.num_comp_vectors; |
| return err; |
| } |
| |
| void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq) |
| { |
| struct mlx4_en_dev *mdev = priv->mdev; |
| struct mlx4_en_cq *cq = *pcq; |
| |
| mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); |
| if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) && |
| cq->type == RX) |
| mlx4_release_eq(priv->mdev->dev, cq->vector); |
| cq->vector = 0; |
| cq->buf_size = 0; |
| cq->buf = NULL; |
| kfree(cq); |
| *pcq = NULL; |
| } |
| |
| void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) |
| { |
| if (cq->type != TX_XDP) { |
| napi_disable(&cq->napi); |
| netif_napi_del(&cq->napi); |
| } |
| |
| mlx4_cq_free(priv->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); |
| } |
| |
| void 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); |
| } |
| |
| |