/* * 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) { cq = kzalloc(sizeof(*cq), GFP_KERNEL); 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->is_tx = 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, 2 * PAGE_SIZE); set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node); if (err) goto err_cq; err = mlx4_en_map_buffer(&cq->wqres.buf); if (err) goto err_res; cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf; *pcq = cq; return 0; err_res: mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 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->is_tx == 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->is_tx) cq->size = priv->rx_ring[cq->ring]->actual_size; if ((cq->is_tx && priv->hwtstamp_config.tx_type) || (!cq->is_tx && priv->hwtstamp_config.rx_filter)) timestamp_en = 1; 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); if (err) goto free_eq; 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) { netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq, NAPI_POLL_WEIGHT); } else { netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); napi_hash_add(&cq->napi); } napi_enable(&cq->napi); 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_en_unmap_buffer(&cq->wqres.buf); mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) && cq->is_tx == 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) { napi_disable(&cq->napi); if (!cq->is_tx) { napi_hash_del(&cq->napi); synchronize_rcu(); } 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); } 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; }