en_cq.c revision 256281
1/* 2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34#include "mlx4_en.h" 35 36#include <linux/mlx4/cq.h> 37#include <linux/mlx4/qp.h> 38#include <linux/mlx4/cmd.h> 39 40static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event) 41{ 42 return; 43} 44 45 46int mlx4_en_create_cq(struct mlx4_en_priv *priv, 47 struct mlx4_en_cq *cq, 48 int entries, int ring, enum cq_type mode) 49{ 50 struct mlx4_en_dev *mdev = priv->mdev; 51 int err; 52 53 cq->size = entries; 54 cq->tq = taskqueue_create_fast("mlx4_en_que", M_NOWAIT, 55 taskqueue_thread_enqueue, &cq->tq); 56 if (mode == RX) { 57 cq->buf_size = cq->size * sizeof(struct mlx4_cqe); 58 cq->vector = (ring + priv->port) % 59 mdev->dev->caps.num_comp_vectors; 60 TASK_INIT(&cq->cq_task, 0, mlx4_en_rx_que, cq); 61 taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s rx cq", 62 if_name(priv->dev)); 63 } else { 64 cq->buf_size = sizeof(struct mlx4_cqe); 65 cq->vector = MLX4_LEAST_ATTACHED_VECTOR; 66 TASK_INIT(&cq->cq_task, 0, mlx4_en_tx_que, cq); 67 taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s tx cq", 68 if_name(priv->dev)); 69 } 70 71 cq->ring = ring; 72 cq->is_tx = mode; 73 mtx_init(&cq->lock.m, "mlx4 cq", NULL, MTX_DEF); 74 75 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, 76 cq->buf_size, 2 * PAGE_SIZE); 77 if (err) 78 return err; 79 80 err = mlx4_en_map_buffer(&cq->wqres.buf); 81 if (err) 82 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 83 else 84 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf; 85 86 return err; 87} 88 89int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 90{ 91 struct mlx4_en_dev *mdev = priv->mdev; 92 int err; 93 94 cq->dev = mdev->pndev[priv->port]; 95 cq->mcq.set_ci_db = cq->wqres.db.db; 96 cq->mcq.arm_db = cq->wqres.db.db + 1; 97 *cq->mcq.set_ci_db = 0; 98 *cq->mcq.arm_db = 0; 99 memset(cq->buf, 0, cq->buf_size); 100 101 if (!cq->is_tx) 102 cq->size = priv->rx_ring[cq->ring].actual_size; 103 104 105 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar, 106 cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx, 0); 107 if (err) { 108 return err; 109 } 110 111 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq; 112 cq->mcq.event = mlx4_en_cq_event; 113 114 if (cq->is_tx) { 115 init_timer(&cq->timer); 116 cq->timer.function = mlx4_en_poll_tx_cq; 117 cq->timer.data = (unsigned long) cq; 118 } 119 120 return 0; 121} 122 123void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 124{ 125 struct mlx4_en_dev *mdev = priv->mdev; 126 127 taskqueue_drain(cq->tq, &cq->cq_task); 128 taskqueue_free(cq->tq); 129 mlx4_en_unmap_buffer(&cq->wqres.buf); 130 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 131 cq->buf_size = 0; 132 cq->buf = NULL; 133 mtx_destroy(&cq->lock.m); 134} 135 136void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 137{ 138 struct mlx4_en_dev *mdev = priv->mdev; 139 140 taskqueue_drain(cq->tq, &cq->cq_task); 141 if (cq->is_tx) 142 del_timer(&cq->timer); 143 144 mlx4_cq_free(mdev->dev, &cq->mcq); 145} 146 147/* Set rx cq moderation parameters */ 148int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 149{ 150 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 151 cq->moder_cnt, cq->moder_time); 152} 153 154int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 155{ 156 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, 157 &priv->mdev->uar_lock); 158 159 return 0; 160} 161 162 163